As President Obama plans new measures to allow US states to crack down on carbon emissions, it's worth looking at the big polluters in the US. There are two sheets here: the first compares the US to other countries in its road emissions and is from the International Transport Forum. The US figures are from the US Energy Information Administration, which keeps the world's best data on global carbon emissions too. We've also broken out figures for emissions from cars, too.

DATA: Carbon emissions from cars - the US compared to other countries and by state
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