This bubble diagram shows the percentage share of global cumulative energy-related <a href="https://en.wikipedia.org/wiki/carbon_dioxide" class="extiw" title="en:carbon dioxide">carbon dioxide</a> emissions between 1751 and 2012 across different regions (<a href="https://en.wikipedia.org/wiki/James_Hansen" class="extiw" title="en:James Hansen">Hansen</a> <i>et al.</i>, 2013, p.17):
<ul><li><a href="https://en.wikipedia.org/wiki/Africa" class="extiw" title="en:Africa">Africa</a> 2.6%</li>
<li><a href="https://en.wikipedia.org/wiki/Canada" class="extiw" title="en:Canada">Canada</a> and Australia 3.1%</li>
<li><a href="https://en.wikipedia.org/wiki/USA" class="extiw" title="en:USA">USA</a> 28%</li>
<li><a href="https://en.wikipedia.org/wiki/South_America" class="extiw" title="en:South America">South</a> and <a href="https://en.wikipedia.org/wiki/Central_America" class="extiw" title="en:Central America">Central America</a> 3.9%</li>
<li><a href="https://en.wikipedia.org/wiki/Middle_East" class="extiw" title="en:Middle East">Middle East</a> 3.4%</li>
<li><a href="https://en.wikipedia.org/wiki/China" class="extiw" title="en:China">China</a> 10.7%</li>
<li><a href="https://en.wikipedia.org/wiki/India" class="extiw" title="en:India">India</a> 3.0%</li>
<li><a href="https://en.wikipedia.org/wiki/Russia" class="extiw" title="en:Russia">Russia</a> 7.3%</li>
<li><a href="https://en.wikipedia.org/wiki/Germany" class="extiw" title="en:Germany">Germany</a> 6.0%</li>
<li><a href="https://en.wikipedia.org/wiki/UK" class="extiw" title="en:UK">UK</a> 5.4%</li>
<li>Rest of <a href="https://en.wikipedia.org/wiki/Europe" class="extiw" title="en:Europe">Europe</a> and <a href="https://en.wikipedia.org/wiki/Eurasia" class="extiw" title="en:Eurasia">Eurasia</a> 16.4%</li>
<li><a href="https://en.wikipedia.org/wiki/Japan" class="extiw" title="en:Japan">Japan</a> 4.0%</li>
<li>Rest of <a href="https://en.wikipedia.org/wiki/Asia-Pacific" class="extiw" title="en:Asia-Pacific">Asia Pacific</a> 4.4%</li>
<li><a href="https://en.wikipedia.org/wiki/Ship" class="extiw" title="en:Ship">Ships</a> and <a href="https://en.wikipedia.org/wiki/aviation" class="extiw" title="en:aviation">aviation</a> 3.7%</li></ul><p>The contribution of emitters to <a href="https://en.wikipedia.org/wiki/global_warming" class="extiw" title="en:global warming">global warming</a> is closely proportional to cumulative emissions (<a href="https://en.wikipedia.org/wiki/James_Hansen" class="extiw" title="en:James Hansen">Hansen</a> <i>et al.</i>, 2013, p.16). See also: <a href="https://en.wikipedia.org/wiki/greenhouse_gas" class="extiw" title="en:greenhouse gas">greenhouse gas</a>.
</p><p>The area and colouring of the circles is proportional to the share of emissions. The <a href="https://en.wikipedia.org/wiki/Radius" class="extiw" title="en:Radius">radius</a> of the circles equals the <a href="https://en.wikipedia.org/wiki/square_root" class="extiw" title="en:square root">square root</a> of (area / <a href="https://en.wikipedia.org/wiki/%CF%80" class="extiw" title="en:π">π</a>;).
</p><p><i>References:</i>
</p>
<ul><li>Hansen, J., <i>et al.</i> (<span class="mw-formatted-date" title="2013-12-03">2013-12-03</span>), “Assessing "Dangerous Climate Change": Required Reduction of Carbon Emissions to Protect Young People, Future Generations and Nature”, in <cite><a href="https://en.wikipedia.org/wiki/PLOS_ONE" class="extiw" title="en:PLOS ONE">PLoS ONE</a></cite><sup><a rel="nofollow" class="external autonumber" href="http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0081648">[1]</a></sup>, volume 8, issue 12. e81648. doi:10.1371/journal.pone.0081648</li></ul>
<a href="//commons.wikimedia.org/wiki/User:Enescot" title="User:Enescot">Enescot</a>
2014-04-23 06:05:37
<span class="int-own-work" lang="en">Own work</span>