-The 1/6th of world's people in developed countries consume same amount as the 5/6ths that live in developing countries.
Energy is consumed in three principal places.
Businesses: mainly coal. Some burn coal in their own furnaces. Others rely on electricity generated at coal-burning power plants.
Homes: mainly natural gas. Used to heat leaving spaces and water.
Transportation: mainly petroleum (oil). Used in cars, trucks, buses, airplanes, and most railroads.
-Have properties especially valuable for fashioning machinery, vehicles, and other goods of modern society.
Water serves many human purposes.
Consumption of a product creates an unwanted by-product - glass, metal, paper, plastic box, wrapper, container, etc.
About 5 pounds of solid waste is produced per person each day in the U.S.
the maintenance of resources in their present condition with as little human impact as possible. Does not think of nature as a resource for human use.