Pollution: Dirty deeds: The world's biggest polluters by country - by Sarah Wolfe

After years of decline, US carbon dioxide emissions increased slightly last year, according to a new report by the US Energy Information Administration.

That said, America is still a little better than the world's worst polluter: China.

The 2 percent jump in CO2 emissions in the United States was largely the result of higher natural gas prices last year, which prompted some utilities to switch back to a dirtier energy source — coal, according to The Washington Post.

Read more: Dirty deeds: The world's biggest polluters by country | GlobalPost