Q: What do forests, water, wildlife, and agriculture have in common?

A: They’re all being reshaped, redistributed, and otherwise readjusted by climate change. Now, in real time.

That's the conclusion of the U.S. Climate Change Science Program, which just released a long-delayed government-commissioned report on how climate change is affecting the American landscape.

This is so much on my mind that I've been looking for every way to do something about it I can find.

Bill McKibben is on a crusade. He wants to pound the number 350 into the heads of everyone on the planet, including yours.

Three fifty is the amount of carbon in parts per million that the atmosphere can handle safely without warming up and melting glaciers, raising the sea level, bringing on killer storms, destroying wildlife habitat, and all the other horrors that pop like mushrooms from your morning paper nearly every day.

Three fifty. Remember it.