Barack Obama showed how a president can wield broad power over environmental policy. But with a majority of Americans concerned about ciimate change, other forces are also influential.
Critics say the initiative deceptively asks Floridians to vote 'for the sun.' At issue is whether utility customers with rooftop panels are subsidized by non-solar customers, or vice versa.
Americans are becoming more polarized about climate change even as scientists find consensus. Two Colorado counties offer a portrait of why this is happening.
Agreement on basics of climate science is very strong, while there is much less certainty about specifics such as how fast temperatures or sea levels can be expected to rise.