FILE - In this June 25, 2013, file photo President Barack Obama 

FILE - In this June 25, 2013, file photo President Barack Obama wipes perspiration from his brow during an ambitious speech about climate change under a steaming hot sun at Georgetown University in Washington. Frustrated by a recalcitrant Congress, Obama has vowed to take climate change into his own hands and is starting to execute his plan to stem the warming of the earth. His plan is a complicated mix of rulemaking and federal permitting that’s tough to encapsulate in a neat sales pitch, and may be even tougher to put into action. But by going it alone and pledging to use his authority under existing laws, Obama has freed himself from the need to sell the plan to skeptical lawmakers. (AP Photo/Charles Dharapak, File)
Associated Press
FILE - In this June 25, 2013, file photo President Barack Obama wipes perspiration from his brow during an ambitious speech about climate change under a steaming hot sun at Georgetown University in Washington. Frustrated by a recalcitrant Congress, Obama has vowed to take climate change into his own hands and is starting to execute his plan to stem the warming of the earth. His plan is a complicated mix of rulemaking and federal permitting that’s tough to encapsulate in a neat sales pitch, and may be even tougher to put into action. But by going it alone and pledging to use his authority under existing laws, Obama has freed himself from the need to sell the plan to skeptical lawmakers. (AP Photo/Charles Dharapak, File)
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