4A. US Greenhouse Gas Emissions by Gas
In the year 2004, the United States emitted over seven billion metric tons of greenhouse gases (CO2E). Carbon dioxide accounted for the largest percentage of greenhouse gases (83%), followed by methane (9%), nitrous oxide (5%), and the high global warming potential gases (2%). To see the sources of these greenhouse gases by economic sectors, go to figure 4B .

Go to Figure 4B
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Links:
[1] http://www.pewclimate.org/global-warming-basics/facts_and_figures/us_emissions/usghgemsector.cfm
[2] http://www.pewclimate.org/global-warming-basics/facts_and_figures/us_emissions/usghgemsector.cfm
[3] http://www.pewclimate.org/global-warming-basics/facts_and_figures/us_emissions
[4] http://www.pewclimate.org/global-warming-basics/facts_and_figures