President Barack Obama said he plans to work with Congress in his second term to curb human-aggravated climate change, but not at the expense of the U.S. economy. “I am a firm believer that climate change is real, that it is impacted by human behavior, and carbon emissions,” Obama said at a televised news conference on Wednesday. “And as a consequence, I think we’ve got an obligation to future generations to do something about it.”Without specifying what actions he would take, Obama said he would speak in the coming months and years to get bipartisan support for tackling the problem of rising global temperatures. Obama pointed to his administration’s tightened fuel efficiency standards on cars and trucks and the increased use of renewable energy in the United States as moves that will limit the amount of carbon dioxide emitted into the atmosphere.