While the idea of long-term climate change is a controversial notion politically, it's accepted as fact by most researchers and Obama.
A March poll from Gallup indicated nearly half -- 47% -- of Americans think the U.S. government is doing too little to protect the environment, while 35% said the government was doing the right amount and 16% said it was doing too much.
The president offered renewed hope to the environmental community -- but fears among the coal mining industry and concerns among climate change skeptics -- in his inauguration speech and State of the Union address this year.
He robustly signaled he would do more to combat climate change during his second term. And again last week, during a speech at the Brandenburg Gate in Berlin, Obama urged countries to work together to fight the "global threat of our time."