Some Democrats deserve to be criticized.

The urgency derives from the nearness of climate tipping points.

The climate system is being pushed hard enough that change will become obvious to the man in the street in the next decade.

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.

Injection of environmental and political perspectives in midstream of the science discussion cannot help the process of inquiry. I believe that persons with relevant scientific expertise should concentrate, with pride, on cool objective analysis, providing information to the public and decision-makers when it is found, but leaving the moral implications for later common consideration, or at most for summary inferential discussion.

The fact is fossil fuel carbon will stay in the surface climate system for millennia.

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.