World GHG emissions

Category of GHG emitter World GHG emissions
“Dirty” power plants
(EPA: electricity category includes electricity for heating)
25%
Industry
(EPA: industry 21% + oil industry from extraction to distribution 10%)
31%
Transport’s gas or diesel engines
(EPA: same classification)
14%
Building heating from hydrocarbons (as heating from electricity is included in the power plant category)
(EPA: same classification)
6%
Agriculture
(EPA: category combines agriculture and “land use”, i.e., forests replaced by agriculture)
24%
TOTAL OF HUMAN ACTIVITY 100%
CO2 removed by ecosystems (i.e., forest and other plants) isn’t included, although it mitigates numbers above. This number could go higher by reversing logging and desertification.
(EPA estimates its share at 5% (i.e., 20% of agriculture’s 24%))
-5%

These figures come from the EPA (2014). Others institutions can be consulted, although they may classify the sources in different categories and numbers may vary slightly for other years.

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