Ecofys, a sustainability consultancy has put together a clear and well-arranged chart that maps worldwide greenhouse gas emissions by source and sector. It is based on data from credible sources such as the IEA, the EU Joint Research Centre, CDIAC, and the Global Carbon Project.
One point worth noting is that while this chart analyzes the greenhouse gasses by source and sector, it does not show the varying contributions to climate change of these different gasses. For example, there is much less methane (CH4) being released into the atmosphere than carbon-dioxide (CO2), but CH4 is about 25 times more potent than CO2 over a 100-year period and about 72 times as potent over a 20-year period. Thus, were one to track the impact on climate change, the contribution from the agricultural sector would exceed that of transportation and buildings (commercial, public, and residential) combined, which is consistent with the claims of many animal rights activists.
