The evidence for human-made climate change is overwhelming.

I was lucky to grow up at a time when it was not difficult for the child of a tenant farmer to make his way to the state university.

...the global surface albedo [surface whiteness] and greenhouse gas changes account for practically the entire global climate change.

A level of no more than 350 ppm is still feasible, with the help of reforestation and improved agricultural practices, but just barely - time is running out.

How long have we got? We have to stabilize emissions of carbon dioxide within a decade, or temperatures will warm by more than one degree... We don't have much time left.

We're running out of time.

Coral reefs, the rain forest of the ocean, are home for one-third of the species of the sea. Coral reefs are under stress for several reasons, including warming of the ocean, but especially because of ocean acidification, a direct effect of added carbon dioxide. Ocean life dependent on carbonate shells and skeletons is threatened by dissolution as the ocean becomes more acid.