Consider what kind of car you get. Buy cars and other products that have the least impact environmentally.

As I have said for many years throughout this land, we're borrowing money from China to buy oil from the Persian Gulf to burn it in ways that destroy the future of human civilization. Every bit of that has to change.

The moral imperative to make big changes is inescapable...that what we take for granted may not be here for our children

American democracy is in grave danger from the changes in the environment in which ideas either live and spread or wither and die.

Surveillance technologies now available - including the monitoring of virtually all digital information - have advanced to the point where much of the essential apparatus of a police state is already in place.

It's not at all new for wealthy and powerful interests to try to hide the ball and ignore independent analyses of relevant facts.

The global environment crisis is, as we say in Tennessee, real as rain, and I cannot stand the thought of leaving my children with a degraded earth and a diminished future.