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One needs to be careful, because some people talk about carbon while others talk about carbon dioxide. When you burn a ton of carbon you get about 3.67 tons of carbon dioxide. Neglecting this can cause big mistakes:
Just remember: C has atomic mass 12, O has atomic mass 16, so CO2 has atomic mass 12+16+16=44, so a molecule of carbon dioxide is
times as heavy as the atom of carbon that was burned to form it.
This chart lists the carbon dioxide emissions of countries worldwide:
This chart includes only CO2 emitted by fossil fuel burning and cement manufacture, not deforestation, change in land use, etc. Methane and other greenhouse gases are not included. Currently the list is based on data from 2007, taken from this report:
The entire world is listed as having emitted 29.3 gigatons of carbon dioxide in 2007. This corresponds to 8 gigatons of carbon. The top five countries are:
country | gigatons of CO2 in 2007 | percentage |
---|---|---|
China | 6.54 | 22.3% |
United States | 5.84 | 19.9% |
India | 1.61 | 5.50% |
Russia | 1.54 | 5.24% |
Japan | 1.2 | 4.28% |
On 6 October 2010, the International Energy Agency released its own data set (calculated using slightly different methods than CDIAC) for 2008 emissions that listed about 140 countries: