In 2010 human activity caused 50 Gt (billion tons) of greenhouse gas (GHG) emissions. These emissions were 76% carbon dioxide (CO2), 16% methane (CH4), 8% nitrous oxide (N20) and 2% F-gases (follow the original publish even they added up to 102%).
The big terrestrial emitters were China (23%), the USA (14%), Europe (10%), India (5%) and Russia (5%).
And the primary sources of emissions were energy (35%), industry
(18%), transport (13%), agriculture (11%), forestry (11%), buildings
(8%) and waste (4%).
Shrink That Footprint used balloons to explain the contribution of GHG emission by sources and shows below.
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