For the second year in a row the number of people concerned about global warming has increased. According to Gallup, 58 percent of Americans are worried a great deal about global warming. This is a large increase from 2011 when only 51 percent of Americans were concerned about it, but it is only a return to where the public was on this issue before the Wall Street crash. From Gallup:

How much do you personally worry about global warming?

Right after the economic collapse Americans became less concerned about global warming as economic issues took on greater importance. They also increasingly doubted its existence. From Gallup:

Perception of What Scientists Believe About Global Warming

As the economy has slowly improved the issue has managed to regain much of the traction it lost. The economic downturn was a set back for environmentalists but only a temporary one.