George Orwell once wrote that a false belief sooner or later collides with physical reality, usually on a battlefield.

You can push your local communities to adopt more sustainable sources of energy and environmentally-friendly practices.

I think the ethical standards established in this White House have been the highest in the history of the White House.

We are seeing every night on the television news now a nature hike through the Book of Revelation. These climate-related extreme weather events have convinced the vast majority of people that the scientists have been right for a long time. We have to address this.

Mother Nature does not do bailouts.

To use a Southern euphemism, our space program has been snake-bit.

The answer is to end our reliance on carbon-based fuels... If we succeed, we create booming new industries, wealth, clean secure energy and maybe we prevent the greatest disaster so far in human history, saving millions of lives while improving billions more. If we fail, basically it's business as usual while things slowly get worse all around us.