Since 1955 the oceans have absorbed roughly twenty times more heat than the atmosphere.

The world beyond 450 ppm atmospheric concentrations of carbon dioxide, the world that crosses carbon cycle tipping points that quickly take us to 1000 ppm, is a world not merely of endless regional resource wars around the globe. It is a world with dozens of Darfurs. It is a world of a hundred Katrinas, of countless environmental refugees

We created a way of raising standards of living that we can't possibly pass on to our children.

On our current path, all our great Gulf and Atlantic coast cities are at risk of meeting the same fate as New Orleans.

Would PBS go so far as to give air time to an even more extreme kind of disinformer, a Holocaust denier?

When people ask me what they should do, I reply, "Get informed, get outraged, and then get political."

Protecting dozens of major coastal cities from future flooding will be challenging enough-rebuilding major coastal cities destroyed by super-hurricanes will be an almost impossible task.