Agence France-Presse: US President Barack Obama will give a major speech on climate change Tuesday in which he is expected to propose executive action to cut carbon pollution.
"I'll lay out my vision for where I believe we need to go -- a national plan to reduce carbon pollution, prepare our country for the impacts of climate change, and lead global efforts to fight it," he said in a statement Saturday.
Obama announced the speech on Twitter, calling global warming a "serious challenge" but one that is "uniquely...