Mark Ruffalo, Michael Mann, Bill McKibben, Neil deGrasse Tyson, and others weigh in with smart questions.
The Diablo Canyon nuclear power plant provides one-tenth of California electricity, but it might be shut down.
Scientists say a "perfect storm" of biological, economic, and climatic events triggered the epidemic.
Where does the green energy from your panels really go?
The Obama administration has put a moratorium on new coal mining leases on public land, and plans to overhaul the whole coal leasing program.
Some states have taken heavy blows to their budgets that could prompt cuts to education and social services.
The year is off to a bad start for purveyors of the dirtiest fossil fuel on earth.
The president has talked about climate change in every annual address, and you can bet that he'll do it again tonight.
New research quantifies the devastating impact of extreme weather on essential crops.