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.

Talking nice about sun and wind and green jobs is just greenwash.

What we are doing to the future of our children, and the other species on the planet, is a clear moral issue.

We have at most ten years—not ten years to decide upon action, but ten years to alter fundamentally the trajectory of global greenhouse emissions.

It would be immoral to leave young people with a climate system spiraling out of control.

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.

We are on the precipice of climate system tipping points beyond which there is no redemption.