You must become a climate champion, a single-issue voter. You must take whatever action you can. You must use whatever influence you have wherever it would make a difference, even if it is only to educate the people around you.

When people ask me what they should do, I reply, "Get informed, get outraged, and then get political."

The science is crystal clear: we humans are the primary cause of global warming, and we face a bleak future if we fail to act quickly.

The entire western Siberian sub-Arctic region is melting, and it has all happened in the last three or four years.

Do believe that if we fail to act in time, it will be the single biggest regret any of us has at the end of our lives.

Since 1955 the oceans have absorbed roughly twenty times more heat than the atmosphere.

The best thing about improvements in health care is that all the climate-change deniers are now going to live long enough to see how wrong they were.