query: If we double atmospheric carbon dioxide[…] we’d only raise global surface temperatures by about a degree Celsius.

positive: Svante Arrhenius Svante August Arrhenius ( 19 February 1859 -- 2 October 1927 ) was a Nobel-Prize winning Swedish scientist , originally a physicist , but often referred to as a chemist , and one of the founders of the science of physical chemistry . He received the Nobel Prize for Chemistry in 1903 , becoming the first Swedish Nobel laureate , and in 1905 became director of the Nobel Institute where he remained until his death . His lasting contributions to science are exemplified and memorialized by the Arrhenius equation , Arrhenius definition of an acid , lunar crater Arrhenius , the mountain of Arrheniusfjellet and the Arrhenius Labs at Stockholm University , all named after him . He was the first to use basic principles of physical chemistry to calculate estimates of the extent to which increases in atmospheric carbon dioxide increase Earth 's surface temperature through the Arrhenius effect , leading Keeling to conclude that human-caused carbon dioxide emissions are large enough to cause global warming .

positive: Carbon dioxide Carbon dioxide ( chemical formula ) is a colorless gas with a density about 60 % higher than that of air ( 1.225 g/L ) that is odorless at normally encountered concentrations . Carbon dioxide consists of a carbon atom covalently double bonded to two oxygen atoms . It occurs naturally in Earth 's atmosphere as a trace gas at a concentration of about 0.04 percent ( 400 ppm ) by volume . Natural sources include volcanoes , hot springs and geysers , and it is freed from carbonate rocks by dissolution in water and acids . Because carbon dioxide is soluble in water , it occurs naturally in groundwater , rivers and lakes , ice caps , glaciers and seawater . It is present in deposits of petroleum and natural gas .   As the source of available carbon in the carbon cycle , atmospheric carbon dioxide is the primary carbon source for life on Earth and its concentration in Earth 's pre-industrial atmosphere since late in the Precambrian has been regulated by photosynthetic organisms and geological phenomena . Plants , algae and cyanobacteria use light energy to photosynthesize carbohydrate from carbon dioxide and water , with oxygen produced as a waste product .   Carbon dioxide is produced by all aerobic organisms when they metabolize carbohydrates and lipids to produce energy by respiration . It is returned to water via the gills of fish and to the air via the lungs of air-breathing land animals , including humans . Carbon dioxide is produced during the processes of decay of organic materials and the fermentation of sugars in bread , beer and winemaking . It is produced by combustion of wood and other organic materials and fossil fuels such as coal , peat , petroleum and natural gas .   It is a versatile industrial material , used , for example , as an inert gas in welding and fire extinguishers , as a pressurizing gas in air guns and oil recovery , as a chemical feedstock and in liquid form as a solvent in decaffeination of coffee and supercritical drying . It is added to drinking water and carbonated beverages including beer and sparkling wine to add effervescence . The frozen solid form of , known as `` dry ice '' is used as a refrigerant and as an abrasive in dry-ice blasting .   Carbon dioxide is the most significant long-lived greenhouse gas in Earth 's atmosphere . Since the Industrial Revolution anthropogenic emissions - primarily from use of fossil fuels and deforestation - have rapidly increased its concentration in the atmosphere , leading to global warming . Carbon dioxide also causes ocean acidification because it dissolves in water to form carbonic acid .

positive: Greenhouse gas A greenhouse gas ( abbrev . GHG ) is a gas in an atmosphere that absorbs and emits radiation within the thermal infrared range . This process is the fundamental cause of the greenhouse effect . The primary greenhouse gases in Earth 's atmosphere are water vapor , carbon dioxide , methane , nitrous oxide , and ozone . Without greenhouse gases , the average temperature of Earth 's surface would be about -18 ° C , rather than the present average of 15 ° C . In the Solar System , the atmospheres of Venus , Mars and Titan also contain gases that cause a greenhouse effect .   Human activities since the beginning of the Industrial Revolution ( taken as the year 1750 ) have produced a 40 % increase in the atmospheric concentration of carbon dioxide , from 280 ppm in 1750 to 406 ppm in early 2017 . This increase has occurred despite the uptake of a large portion of the emissions by various natural `` sinks '' involved in the carbon cycle . Anthropogenic carbon dioxide emissions ( i.e. , emissions produced by human activities ) come from combustion of fossil fuels , principally coal , oil , and natural gas , along with deforestation , soil erosion and animal agriculture .   It has been estimated that if greenhouse gas emissions continue at the present rate , Earth 's surface temperature could exceed historical values as early as 2047 , with potentially harmful effects on ecosystems , biodiversity and the livelihoods of people worldwide . Recent estimates suggest that on the current emissions trajectory the Earth could pass a threshold of 2 ° C global warming , which the United Nations ' IPCC designated as the upper limit to avoid `` dangerous '' global warming , by 2036 .

positive: Global warming Global warming , also referred to as climate change , is the observed century-scale rise in the average temperature of the Earth 's climate system and its related effects . Multiple lines of scientific evidence show that the climate system is warming . Many of the observed changes since the 1950s are unprecedented in the instrumental temperature record which extends back to the mid 19th century , and in paleoclimate proxy records over thousands of years .   In 2013 , the Intergovernmental Panel on Climate Change ( IPCC ) Fifth Assessment Report concluded that `` It is extremely likely that human influence has been the dominant cause of the observed warming since the mid-20th century . '' The largest human influence has been emission of greenhouse gases such as carbon dioxide , methane and nitrous oxide . Climate model projections summarized in the report indicated that during the 21st century the global surface temperature is likely to rise a further 0.3 to for their lowest emissions scenario and 2.6 to for the highest emissions scenario . These findings have been recognized by the national science academies of the major industrialized nations and are not disputed by any scientific body of national or international standing .   Future climate change and associated impacts will differ from region to region around the globe . Anticipated effects include warming global temperature , rising sea levels , changing precipitation , and expansion of deserts in the subtropics . Warming is expected to be greater over land than over the oceans and greatest in the Arctic , with the continuing retreat of glaciers , permafrost and sea ice . Other likely changes include more frequent extreme weather events including heat waves , droughts , heavy rainfall with floods and heavy snowfall ; ocean acidification ; and species extinctions due to shifting temperature regimes . Effects significant to humans include the threat to food security from decreasing crop yields and the abandonment of populated areas due to rising sea levels . Because the climate system has a large `` inertia '' and greenhouse gases will stay in the atmosphere for a long time , many of these effects will not only exist for decades or centuries , but will persist for tens of thousands of years .   Possible societal responses to global warming include mitigation by emissions reduction , adaptation to its effects , building systems resilient to its effects , and possible future climate engineering . Most countries are parties to the United Nations Framework Convention on Climate Change ( UNFCCC ) ,  whose ultimate objective is to prevent dangerous anthropogenic climate change . Parties to the UNFCCC have agreed that deep cuts in emissions are required and that global warming should be limited to well below 2.0 C-change relative to pre-industrial levels , with efforts made to limit warming to 1.5 C-change .   Public reactions to global warming and concern about its effects are also increasing . A global 2015 Pew Research Center report showed a median of 54 % consider it `` a very serious problem '' . There are significant regional differences , with Americans and Chinese ( whose economies are responsible for the greatest annual CO2 emissions ) among the least concerned .

negative: Terraforming of Venus The terraforming of Venus is the hypothetical process of engineering the global environment of the planet Venus in such a way as to make it suitable for human habitation . Terraforming Venus was first seriously proposed by the astronomer Carl Sagan in 1961 , although fictional treatments , such as The Big Rain by Poul Anderson , preceded it . Adjustments to the existing environment of Venus to support human life would require at least three major changes to the planet . These three changes are closely interrelated , because Venus 's extreme temperature is due to the greenhouse effect caused by its dense carbon-dioxide atmosphere :  Reducing Venus 's surface temperature of 462 C.  Eliminating most of the planet 's dense 9.2 MPa carbon dioxide and sulfur dioxide atmosphere , via removal or conversion to some other form .  Addition of breathable oxygen to the atmosphere .

negative: Carbonate–silicate cycle The carbonate -- silicate geochemical cycle describes the transformation of silicate rocks to carbonate rocks by weathering and sedimentation at Earth 's surface and the transformation of carbonate rocks back into silicates by metamorphism and magmatism . It plays a large part in the carbon cycle , since the equilibrium point of the carbonate-silicate cycle dictates the pace of carbon release from the lithosphere .   The carbonate-silicate cycle involves several chemical reactions that occur in different environments . In the atmosphere , gaseous carbon dioxide ( CO2 ) dissolves in rainwater , forming natural carbonic acid ( H2CO3 ) . This weak acid weathers silicate rocks on continents , slowly dissolving the rock and releasing aqueous minerals through the chemical reaction CaSiO3 ( s ) ( wollastonite ) + 2CO2 ( g ) + H2O ( l ) → Ca + 2HCO ( aq ) ( bicarbonate ) + SiO2 ( aq ) ( dissolved silica ) . These dissolved minerals are eventually carried by water to the ocean , where they are used by living organisms such as foraminifera , radiolarians , coccolithopores , and diatoms to create shells of CaCO3 ( calcite ) or SiO2 ( opal ) through the reactions Ca2 + ( aq ) + 2HCO3 → CaCO3 ( s ) + CO2 ( g ) + H2O ( l ) ( for calcite precipitation ) and SiO2 ( aq ) → SiO2 ( s ) ( for opal precipitation ) . When these organisms die , many shells are remineralized but some shells fall all the way to the sea floor and are buried . The cycle is completed when the sea floor is subducted and carbonate minerals recombine with silicate minerals under temperatures above 300 ° C to reform calcium silicates and release gaseous CO2 through volcanism ( CaCO3 ( s ) + SiO2 ( s ) → CaSiO3 ( s ) + CO2 ( g ) ) .   The carbonate-silicate cycle impacts the global carbon cycle , as carbon dioxide is removed from the Earth 's surface through the burial of weathered minerals in deep ocean sediments and returned to the atmosphere through metamorphism and volcanism . However , this process is far from being a closed loop . In Earth history generally the formation of carbonates significantly outpaces the formation of silicates , effectively removing carbon dioxide from the atmosphere . Because carbon dioxide is a potent greenhouse gas , the carbonate-silicate cycle is suspected to initiate ice ages by creating a negative feedback on the global temperature with a typical time scale of a few million years that is capable of countering water vapor and carbon dioxide short-term positive feedback on global temperature .   The carbonate-silicate cycle equilibrium point is shifted on Venus due to surface temperatures above 300 ° C , which favor the formation of calcium silicates over weathering . Thus , Venus has a high-density carbon-dioxide atmosphere .

negative: Effect of radiation on perceived temperature The `` radiation effect '' results from radiation heat exchange between human bodies and surrounding surfaces , such as walls and ceilings . It may lead to phenomena such as houses feeling cooler in the winter and warmer in the summer at the same temperature . For example , in a room in which air temperature is maintained at 22 ° Celsius at all times , but in which the inner surfaces of the house is estimated to be an average temperature of 10 ° Celsius in the winter or 25 ° Celsius in the summer , heat transfer from the surfaces to the individual will occur , resulting in a difference in the perceived temperature .   We can observe and compare the rate of radiation heat transfer between a person and the surrounding surfaces if we first make a few simplifying assumptions :  The heat exchange in the environment is in a `` steady state '' , meaning that there is a constant flow of heat either into or out of the house .  The person is completely surrounded by the interior surfaces of the room .  Heat transfer by convection is not considered .  The walls , ceiling , and floor are all at the same temperature .  For an average person , the outer surface area is 1.4 m ² , the surface temperature is 30 ° Celsius , and the emissivity is 0.95 . Emissivity is the ability of a surface to emit radiant energy compared to that of a black body at the same temperature .  We will be using the following equation to find out how much heat is lost by a person standing in the same room in summertime as compared to the winter , at exactly the same thermostat reading temperature :  Q ̇ = εσA_s ( T_s ^ 4-T_surr ^ 4 )  Where Q ̇ is the rate of heat loss ( W ) , ε is the emissivity ( or the ability of an objects surface to emit energy by radiation ) of a person , σ is the Stefan-Boltzmann constant ( 5.670 x 10 ^ ( -8 ) W/m2 ∙ K4 ) , As is the surface area of a person , Ts is the surface temperature of a person ( K ) , and Tsurr is the surface temperature of the walls , ceiling , and floor ( K ) . Please note that this equation is only valid for an object standing in a completely enclosed room , box , etc. .   In the winter , the amount of heat loss from a person , when the inner surfaces of the room were 10 degrees Celsius , was found to be 152 Watts .  ( Q ̇ = ( 0.95 ) ( 5.67 x 10 ^ ( -8 ) ) ( 1.4 ) -LSB- ( 30 +273 ) ^ 4 - ( 10 +273 ) ^ 4 -RSB- = 152 ) ̇   In the summer , the amount of heat loss from a person , when the inner surfaces of the room were 25 degrees Celsius , was found to be 40.9 Watts .  ( Q ̇ = ( 0.95 ) ( 5.67 x 10 ^ ( -8 ) ) ( 1.4 ) -LSB- ( 30 +273 ) ^ 4 - ( 25 +273 ) ^ 4 -RSB- = 40.9 ) ̇  Thermal radiation is the form of radiation emitted by bodies because of their temperature .  It differs from other forms of electromagnetic radiation such as x-rays , gamma rays , microwaves , radio waves , and television rays that are not related to temperature . Scientists have found that all bodies at a temperature above absolute zero emit thermal radiation . People are constantly radiating their body heat , but at different rates . From these values , the rate of heat loss from a person is almost four times as large in the winter than in the summer , which explains the `` chill '' we feel in the winter even if the thermostat setting is kept the same .

negative: Polar forests of the Cretaceous Cretaceous polar forests were temperate forests that grew at polar latitudes during the final period of the Mesozoic Era , known as the Cretaceous Period 145 -- 66 Ma . During this period , global average temperature was about 10 C-change higher and carbon dioxide ( CO2 ) levels were approximately 1000 parts per million ( ppm ) , 2.5 times the current concentration in Earth 's atmosphere . The abundance of atmospheric carbon dioxide had a very significant impact on global climate and Earth 's natural systems as its concentration is considered one of the main factors in the development of a pronounced greenhouse Earth during the Cretaceous with a very low average global temperature gradient . As a consequence , high paleolatitudes in both hemispheres were much warmer than at present . This temperature gradient was partly responsible for the lack of continental ice sheets in polar regions .   As a response to elevated global temperatures , the Earth 's hydrologic cycle was significantly enhanced due to greater volume of moisture evaporation from the surface of the ocean . In turn , the absolute sea level during this time period stood at elevations much higher than the present level . Continental encroachment of seawater formed widespread shallow seas , including expanses of epeiric seas .   An increase in surface area between shallow , warm epeiric seawater and the atmosphere permits higher evaporation rates and more precipitation at various latitudes , producing a more temperate global climate . A widespread temperate climate also had significant effects on high latitude ecosystems .

negative: Cold inflation pressure Cold inflation pressure is the inflation pressure of tires before the car is driven and the tires warmed up . Recommended cold inflation pressure is displayed on the owner 's manual and on the placard ( or sticker ) attached to the vehicle door edge , pillar , glovebox door or fuel filler flap . Drivers are encouraged to make sure their tires are adequately inflated , as suboptimal tire pressure can greatly reduce fuel economy , increase emissions , increased wear on the edges of the tire surface , and can lead to premature failure of the tire . Excessive pressure , on the other hand , may lead to impact-breaks , decrease braking performance , and cause uneven wear ( i.e. greater wear on the center part of the tire surface ) .   Tire pressure is commonly measured in psi in the imperial and US customary systems , bar , which is deprecated but accepted for use with SI or the kilopascal ( kPa ) , which is an SI unit .   Ambient temperature affects the cold tire pressure . Absolute cold tire pressure ( gauge pressure plus atmospheric pressure ) varies directly with the absolute temperature , measured in kelvins .   From physics , the ideal gas law states that PV = nRT where P is absolute pressure , T is absolute temperature ( Kelvin ) , V is the volume ( assumed to be relatively constant in the case of a tire ) , and nR is constant for a given number of molecules of gas . To understand this , assume the tire was filled when it was 300 kelvin ( 80 degrees Fahrenheit ) . If the temperature varies 10 % , i.e. by 30 kelvin ( also 30 Celsius degrees or 54 Fahrenheit degrees ) , the pressure varies 10 % . So if the tire was filled at 80F to 32 psi ( or 47 psi absolute when we add atmospheric pressure ) , the change would be 4.7 psi for this 30 Celsius degree change , or .16 psi per Celsius degree or .1 psi per Fahrenheit degree or 1 psi for every 10 Fahrenheit degrees . Using SI units , that would be 1.1 kPa per kelvin .   Hence , for a tire filled to 32 psi , the approximation usually made is that within the range of normal atmospheric temperatures and pressures :  Tire pressure increases 1 psi for each 10 Fahrenheit degree increase in temperature , or conversely decreases 1 psi for each 10 Fahrenheit degree decrease in temperature and  in SI units , tire pressure increases 1.1 kPa for each 1 Celsius degree increase in temperature , or conversely decreases 1.1 kPa for each 1 Celsius degree decrease in temperature . For tires that need inflation greater than 32psi it might be easier to use a Rule of Thumb of 2 % pressure change for a change of 10 degrees Fahrenheit .  From the table below , one can see that these are only approximations .

negative: Carbon sequestration Carbon sequestration is the process involved in carbon capture and the long-term storage of atmospheric carbon dioxide . Carbon sequestration involves long-term storage of carbon dioxide or other forms of carbon to mitigate or defer global warming . It has been proposed as a way to slow the atmospheric and marine accumulation of greenhouse gases , which are released by burning fossil fuels .   Carbon dioxide is naturally captured from the atmosphere through biological , chemical , and physical processes . Artificial processes have been devised to produce similar effects , including large-scale , artificial capture and sequestration of industrially produced using subsurface saline aquifers , reservoirs , ocean water , aging oil fields , or other carbon sinks .

negative: Life on Venus The speculation of life currently existing on Venus decreased significantly since the early 1960s , when spacecraft began studying Venus and it became clear that the conditions on Venus are extreme compared to those on Earth .   The fact that Venus is located closer to the Sun than Earth , raising temperatures on the surface to nearly 735 K , the atmospheric pressure is 90 times that of Earth , and the extreme impact of the greenhouse effect , make water-based life as we know it unlikely on the surface of the planet . However , a few scientists have speculated that thermoacidophilic extremophile microorganisms might exist in the lower-temperature , acidic upper layers of the Venusian atmosphere .

negative: Tropical peat Areas of tropical peat are found mostly in South East Asia ( about 70 % by area ) although are also found in Africa , Central and South America and elsewhere around the Pacific Ocean . Tropical peatlands are significant carbon sinks and store large amounts of carbon and their destruction can significantly impact on the amount of atmospheric carbon dioxide . Tropical peatlands are vulnerable to destabilisation through human and climate induced changes . Estimates of the area ( and hence volume ) of tropical peatland vary but a reasonable estimate is in the region of 380,000 square kilometres .   Although tropical peatlands only cover about 0.25 % of the Earth 's land surface they contain 50,000-70 ,000 million tonnes of carbon ( about 3 % global soil carbon ) . In addition , tropical peatlands support diverse ecosystems and are home to a number of endangered species including the orang utan .   The native peat swamp forests contain a number of valuable timber-producing trees plus a range of other products of value to local communities , such as bark , resins and latex . Land-use changes and fire , mainly associated with plantation development and logging ( deforestation and drainage ) , are reducing this carbon store and contributing to greenhouse gas ( GHG ) emissions .   The problems that result from development of tropical peatland stem mainly from a lack of understanding of the complexities of this ecosystem and the fragility of the relationship between peat and forest . Once the forest is removed and the peat is drained , the surface peat oxidises and loses stored carbon rapidly to the atmosphere ( as carbon dioxide ) . This results in progressive loss of the peat surface , leading to local flooding and , due to the large areas involved , global climate change . Failure to account for such emissions results in underestimates of the rate of increase in atmospheric GHGs and the extent of human induced climate change .

negative: Silver oxalate Silver oxalate is commonly employed in experimental petrology to add carbon dioxide to experiments as it will break down to silver ( Ag ) and carbon dioxide under geologic conditions . It is also a precursor to the production of silver nanoparticles .  It is explosive upon heating around 140 degrees Celsius , shock or friction .

negative: 350.org 350 . org is an international environmental organization encouraging citizens to action with the belief that publicizing the increasing levels of carbon dioxide will pressure world leaders to address climate change and to reduce levels from 400 parts per million to 350 parts per million . It was founded by author Bill McKibben with the goal of building a global grassroots movement to raise awareness about human-driven climate change , to confront climate change denial , and to cut emissions of carbon dioxide in order to slow the rate of global warming . 350 . org takes its name from the research of Goddard Institute for Space Studies scientist James E. Hansen , who posited in a 2007 paper that 350 parts-per-million ( ppm ) of CO2 in the atmosphere is a safe upper limit to avoid a climate tipping point .

negative: D. James Baker D. James Baker ( born March 23 , 1937 ) is an American scientist who was trained as a physicist , practiced as an oceanographer , and has held science and management positions in academia , non-profit institutions , and government agencies . He a former Under Secretary of Commerce for Atmosphere and Oceans and Administrator of the U.S. National Oceanic and Atmospheric Administration ( NOAA ) , and currently Director , Global Carbon Measurement Program , William J. Clinton Foundation working with forestry programs in developing countries with the aim of reducing carbon dioxide emissions and at the same time helping alleviate poverty .

negative: Controlled atmosphere A controlled atmosphere is an agricultural storage method in which the concentrations of oxygen , carbon dioxide and nitrogen , as well as the temperature and humidity of a storage room are regulated . Both dry commodities and fresh fruit and vegetables can be stored in controlled atmospheres .

negative: Center for the Study of Carbon Dioxide and Global Change The Center for the Study of Carbon Dioxide and Global Change is a 501 ( c ) ( 3 ) non-profit organization based in Tempe , Arizona . The Center produces a weekly online science newsletter called CO2Science .   The Center was founded and is run by Craig D. Idso , along with Sherwood B. Idso , his father , and Keith E. Idso , his brother . They came from backgrounds in agriculture and climate . According to the Idsos , they became involved in the global warming controversy through their study of earth 's temperature sensitivity to radiative perturbations and plant responses to elevated CO2 levels and carbon sequestration . The Center sharply disputes the consensus scientific opinion on climate change shown in IPCC assessment reports , and believes that global warming will be beneficial to mankind .

negative: Deforestation and climate change Deforestation is one of the main contributors to climate change . It is the second largest anthropogenic source of carbon dioxide to the atmosphere , after fossil fuel combustion . Deforestation and forest degradation contribute to atmospheric greenhouse gas emissions through combustion of forest biomass and decomposition of remaining plant material and soil carbon . It used to account for more than 20 % of carbon dioxide emissions , but it 's currently somewhere around the 10 % mark . By 2008 , deforestation was 12 % of total , or 15 % if peatlands are included . These proportions are likely to have fallen since given the continued rise of fossil fuel use .   Averaged over all land and ocean surfaces , temperatures warmed roughly 1.53 ° F ( 0.85 ° C ) between 1880 and 2012 , according to the Intergovernmental Panel on Climate Change . In the Northern Hemisphere , 1983 to 2012 were the warmest 30-year period of the last 1400 years .

negative: Bosch reaction The Bosch reaction is a chemical reaction between carbon dioxide and hydrogen that produces elemental carbon ( graphite ) , water , and a 10 % return of invested heat . It is named after the German chemist Carl Bosch . This reaction requires the introduction of iron as a catalyst and requires a temperature level of 530-730 degrees Celsius .   The overall reaction is as follows :   CO2 ( g ) + 2 H2 ( g ) → C ( s ) + 2 H2O ( g )   The above reaction is actually the result of two reactions . The first reaction , the reverse water gas shift reaction , is a fast one :   CO2 + H2 → CO + H2O   The second reaction controls the reaction rate :   CO + H2 → C + H2O   The overall reaction produces 2.3 × 103 joules for every gram of carbon dioxide reacted at 650 ° C. Reaction temperatures are in the range of 450 to 600 ° C.   The reaction can be accelerated in the presence of an iron , cobalt or nickel catalyst . Ruthenium also serves to speed up the reaction .   Together with the Sabatier reaction , the Bosch reaction is studied as a way to remove carbon dioxide and to generate clean water aboard a space station .   The reaction is also used to produce graphite for radiocarbon dating with Accelerator Mass Spectrometry .   The Bosch reaction is being investigated for use in maintaining space station life support . Though the Bosch reaction would present a completely closed hydrogen and oxygen cycle which only produces atomic carbon as waste , difficulties in maintaining its higher required temperature and properly handling carbon deposits mean that significantly more research will be required before a Bosch reactor can become a reality . One problem is that the production of elemental carbon tends to foul the catalyst 's surface , which is detrimental to the reaction 's efficiency .

negative: Charles David Keeling Charles David Keeling ( April 20 , 1928 -- June 20 , 2005 ) was an American scientist whose recording of carbon dioxide at the Mauna Loa Observatory first alerted the world to the possibility of anthropogenic contribution to the `` greenhouse effect '' and global warming . The Keeling Curve measures the progressive buildup of carbon dioxide , a greenhouse gas , in the atmosphere .

negative: NGC 40 NGC 40 ( also known as the Bow-Tie Nebula and Caldwell 2 ) is a planetary nebula discovered by William Herschel on November 25 , 1788 , and is composed of hot gas around a dying star . The star has ejected its outer layer which has left behind a smaller , hot star with a temperature on the surface of about 50,000 degrees Celsius . Radiation from the star causes the shed outer layer to heat to about 10,000 degrees Celsius , and is about one light-year across . About 30,000 years from now , scientists theorize that NGC 40 will fade away , leaving only a white dwarf star approximately the size of Earth .

negative: DAOY (biology) DAOY is a widely used human primary medulloblastoma cell line . It has epithelial morphology and was obtained from a 4-year-old Caucasian boy in 1985 . It can be obtained from the American Type Culture Collection ( ATCC ) where it is known by the accession number HTB-186 . Its proteome and phenotype have been investigated in many publications .   DAOY is most commonly grown in Eagle 's minimal essential medium with 10 % FBS and antibiotics . It is incubated at 37 degrees Celsius in a 5 % carbon dioxide atmosphere .

negative: Guy Stewart Callendar Guy Stewart Callendar ( February 1897 - October 1964 ) was an English steam engineer and inventor . His main contribution to knowledge was developing the theory that linked rising carbon dioxide concentrations in the atmosphere to global temperature . This theory , earlier proposed by Svante Arrhenius , has been called the Callendar effect . Callendar thought this warming would be beneficial , delaying a `` return of the deadly glaciers . ''

negative: Thermally Advantaged Chassis A Thermally Advantaged Chassis ( TAC ) is a computer enclosure that complies with the Thermally Advantaged Chassis specifications created by Intel . It is capable of maintaining an internal ambient temperature below 38 degrees Celsius when functioning with Intel 's Pentium 4 and Celeron D processors based on 90 nm process technology , and an ambient temperature below 39 degrees Celsius when using a Pentium D processor . Intel maintains that using a thermally advantaged chassis is the absolute minimum requirement for using Pentium 4 ( Prescott ) , Pentium D , and Celeron D , processors .

negative: Thomas D. Sharkey (plant biochemist) Thomas D. Sharkey is a plant biochemist who studies gas exchange between plants and the atmosphere . His research has covered ( 1 ) carbon metabolism of photosynthesis from carbon dioxide uptake to carbon export from the Calvin-Benson Cycle , ( 2 ) isoprene emission from plants , and ( 3 ) abiotic stress tolerance . Four guiding questions are : ( 1 ) how leaf photosynthesis affects plant yield , ( 2 ) does some carbon fixation follow an oxidative pathway that reduces sugar output but stabilizes photosynthesis , ( 3 ) why plants make isoprene , and ( 4 ) how plants cope with high temperature .

negative: Carbothermic reaction Carbothermic reactions involve the reduction of substances , often metal oxides , using carbon as the reducing agent . These chemical reactions are usually conducted at temperatures of several hundred degrees Celsius . Such processes are applied for production of the elemental forms of many elements . Carbothermic reactions are not useful for some metal oxides , such as those of sodium and potassium . The ability of metals to participate in carbothermic reactions can be predicted from Ellingham diagrams .   Carbothermal reactions produce carbon monoxide and sometimes carbon dioxide . The facility of these conversions is attributable to the entropy of reaction : two solids , the metal oxide and carbon , are converted to a new solid ( metal ) and a gas ( CO ) , the latter having high entropy . Heat is required for carbothermic reactions because diffusion of the reacting solids is otherwise slow .

negative: Climate change and potatoes Global warming is predicted to have significant effects on global potato production . Like many crops , potatoes are likely to be affected by changes in atmospheric carbon dioxide , temperature and precipitation , as well as interactions between these factors . As well as affecting potatoes directly , climate change will also affect the distributions and populations of many potato diseases and pests .  Potato is one of the world 's most important food crops . Potato production must be adapted to climate change to avoid reductions in crop yields .

negative: Carbon suboxide Carbon suboxide , or tricarbon dioxide , is an oxide of carbon with chemical formula C3O2 or O = C = C = C =O . Its four cumulative double bonds make it a cumulene . It is one of the stable members of the series of linear oxocarbons O = Cn =O , which also includes carbon dioxide ( CO2 ) and pentacarbon dioxide ( C5O2 ) . Although if carefully purified it can exist at room temperature in the dark without decomposing , it will polymerize under certain conditions .   The substance was discovered in 1873 by Benjamin Brodie by subjecting carbon monoxide to an electric current . He claimed that the product was part of a series of `` oxycarbons '' with formulas Cx +1 Ox , namely C , C2O , C3O2 , C4O3 , C5O4 , ... , and to have identified the last two ; however only C3O2 is known . In 1891 Marcellin Berthelot observed that heating pure carbon monoxide at about 550 ° C created small amounts of carbon dioxide but no trace of carbon , and assumed that a carbon-rich oxide was created instead , which he named `` sub-oxide '' . He assumed it was the same product obtained by electric discharge and proposed the formula C2O . Otto Diels later stated that the more organic names dicarbonylmethane and dioxallene were also correct .   It is commonly described as an oily liquid or gas at room temperature with an extremely noxious odor .

negative: Atmospheric thermometer A atmospheric thermometer is a device that measures the temperature of the indoor or outdoor atmosphere . The most common type consists of a long tube that contains mercury or colored alcohol at the base , although there are also other kinds , such as spring and digital thermometers . When the atmospheric temperature rises , it causes the material inside the air thermometer to expand . Conversely , when the air gets colder , the material contracts and travels back down.Thermometers use temperature scales either Fahrenheit , Celsius , Kelvin , to provide a measure of heat in degrees .   Category : Thermometers

negative: Millisecond furnace A Millisecond Furnace is a device used for cracking naphtha into ethylene , by extremely short ( 50 to 100 millisecond ) exposure to temperatures of about 900 degrees Celsius , followed by a rapid quenching below 750 degrees Celsius .   It was developed by M W Kellogg and Idemitsu in the 1970s .

negative: Shuang River Cave Group Shuang River Cave Group , is the longest cave in China , the second longest in Asia , and 20th longest in the world .  It is located near the town of Wenquan in Suiyang County , Guizhou Province .   This gypsum and dolomite cave has carbon dioxide levels of approximately 400ppm , with a constant temperature of about 13 degrees Celsius year round .   The cave contains numerous waterfalls , and at least three underground rivers , some of which contain cave shrimp , and fish weighing several pounds . Also found , have been tadpoles , frogs , insects , spiders , bats , leeches , blind fish , and mushrooms .   Since 1987 , at least 5 expeditions from France and Japan have explored the cave .

negative: RTTOV (radiative transfer code) RTTOV - the fast radiative transfer model for calculations of radiances for satellite infrared or microwave nadir scanning radiometers ( see push broom scanner ) .   Given an atmospheric profile of temperature , variable gas concentrations , cloud and surface properties RTTOV calculates radiances and brightness temperatures . The only mandatory input is water vapour . Optionally ozone , carbon dioxide , nitrous oxide , methane and carbon monoxide can be variable with all other constituents assumed  to be constant . The range of temperatures and water vapour concentrations over which the optical  depth computations are valid depends on the training datasets which were used . The spectral range of the RTTOV9 .1 model is 3-20 micrometres ( 500 -- 3000 cm-1 ) in the infrared .   RTTOV contains forward , tangent linear , adjoint and K ( full Jacobian matrices ) versions of the model ; the latter three modules for variational  assimilation or retrieval applications .   One of several applications of RTTOV are retrievals of brightness temperature and sea surface temperature from Advanced Very High Resolution Radiometer sensor .

negative: V.E. Zuev Institute of Atmospheric Optics The V.E. Zuev Institute of Atmospheric Optics is a Russian research organisation based in Tomsk . Its purpose is to study the atmosphere . The Laboratory of Optical Signals Propagation gathers satellite data on aerosols , ozone , and Earth reflectivity over Siberia . The Laboratory of Aerosol Optics collects information on temperature , humidity , soot , and atmospheric scattering at Tomsk . The TOR Station measures gas constituents in the atmosphere , in cluding carbon dioxide , carbon monoxide , sulfur dioxide , ozone , nitrogen oxides , methane and hydrogen sulfide at two locations . The Siberian lidar station can measure the temperature in the stratosphere and troposphere . Aerosol particle size is measured by using six different wavelengths for the laser .   The institute was founded in 1969 by Vladimir Yevseyevich Zuev who became its director . The parent organisation was the Laboratory of Infrared Radiations of the Siberian Physical-Technical Institute of the Tomsk State University .   A journal is published called Atmospheric and Oceanic Optics .

negative: Carbon dioxide clathrate Carbon dioxide hydrate is a snow-like crystalline substance composed of water ice and carbon dioxide . It normally is a Type I gas clathrate . However , there has been some experimental evidence for the development of a metastable Type II phase at A temperature near the ice melting point . The clathrate can exist below 283K ( 10 ° C ) at a range of pressures of carbon dioxide . It is quite likely to be important on Mars due to the presence of carbon dioxide and ice at low temperatures .

negative: Airborne fraction The airborne fraction is a scaling factor defined as the ratio of the annual increase in atmospheric to the emissions from anthropogenic sources . It represents the proportion of human emitted that remains in the atmosphere . The fraction averages about 45 % , meaning that approximately half the human-emitted is absorbed by ocean and land surfaces . There is some evidence for a recent increase in airborne fraction , which would imply a faster increase in atmospheric for a given rate of human fossil-fuel burning . However , other sources suggest that the `` fraction of carbon dioxide has not increased either during the past 150 years or during the most recent five decades '' .   Changes in carbon sinks can affect the airborne fraction .

negative: Celsius Celsius , also known as centigrade , is a metric scale and unit of measurement for temperature . As an SI derived unit , it is used by most countries in the world . It is named after the Swedish astronomer Anders Celsius ( 1701 -- 1744 ) , who developed a similar temperature scale . The degree Celsius ( ° C ) can refer to a specific temperature on the Celsius scale as well as a unit to indicate a temperature interval , a difference between two temperatures or an uncertainty . Before being renamed to honour Anders Celsius in 1948 , the unit was called centigrade , from the Latin centum , which means 100 , and gradus , which means steps .   The current scale is based on 0 ° for the freezing point of water and 100 ° for the boiling point of water at 1 atm pressure following a change introduced by Jean-Pierre Christin to reverse the Celsius thermometer scale ( from water boiling at 0 degrees and ice melting at 100 degrees ) . This scale is widely taught in schools today . By international agreement the unit `` degree Celsius '' and the Celsius scale are currently defined by two different temperatures : absolute zero , and the triple point of Vienna Standard Mean Ocean Water ( VSMOW ) , a specially purified water . This definition also precisely relates the Celsius scale to the Kelvin scale , which defines the SI base unit of thermodynamic temperature with symbol K. Absolute zero , the lowest temperature possible , is defined as being precisely 0 K and − 273.15 ° C . The temperature of the triple point of water is defined as exactly 273.16 K at 611.657 Pa pressure .   Thus , the magnitude of one degree Celsius and that of one kelvin are exactly the same and the difference between the two scales ' null points is precisely 273.15 degrees ( and ) .