One of the big questions in the climate change debate: Are humans any smarter than frogs in a pot? If you put a frog in a pot and slowly turn up the heat, it won't jump out. Instead, it will enjoy the nice warm bath until it is cooked to death. We humans seem to be doing pretty much the same thing.

Compared to coal, which generates almost half the electricity in the United States, natural gas is indeed a cleaner, less polluting fuel. But compared to, say, solar, it's filthy. And of course there is nothing renewable about natural gas.

For better or worse, the bulk of coal industry jobs are in Appalachia - and when that coal is gone, so are the jobs.

When it comes to energy, cost isn't everything - but it's a lot. Everybody wants cheap power.

One of the big questions in the climate change debate: Are humans any smarter than frogs in a pot? If you put a frog in a pot and slowly turn up the heat, it won't jump out. Instead, it will enjoy the nice warm bath until it is cooked to death. We humans seem to be doing pretty much the same thing.

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

In the world of energy politics, the sudden vanishing of the word 'coal' is a remarkable and unprecedented event.