This gure shows worldwide emissions of carbon dioxide, methane, nitrous oxide, and several uorinated gases from 1990 to 2010. For consistency, emissions are expressed in million metric tons of carbon dioxide equivalents. These totals include emissions and sinks due to land-use change and forestry.   Data sources: WRI, 2014; FAO, 2014 * HFCs are hydrofluorocarbons,...Continue Reading