Extracting oil from the tar sands is a nasty, polluting, energy-intensive business.

One thing you can say about nuclear power: the people who believe it is the silver bullet for America's energy problems never give up.

When it comes to climate and energy, Gates is a radical consumerist. In his view, energy consumption is good - it just needs to be clean energy.

Some studies suggest that the Arctic Ocean may be ice-free by the end of the century.

Bloomberg is famously impatient with beltway politics and believes that to get anything done you need to work from the ground up.

This Dewdrop World is a beautiful, courageous, intimate film about love and loss. It may also be the deepest meditation on climate change that I've ever seen.

In the United States, we do a pretty good job of protecting iconic landscapes and postcard views, but the ocean gets no respect.