The last time Earth was 1°C warmer than today, sea levels were 20 feet higher.

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.

Some 3 million years ago, when the earth was a little more than 3°C warmer than preindustrial levels (about 2.2°C warmer than today), Antarctica had far less ice and sea levels were a stunning 25 meters higher than today. If we stay on our current emissions path, the planet will almost certainly be that warm by the century's end.

We created a way of raising standards of living that we can't possibly pass on to our children.

In 2003... the White House conspired with an oil-company funded think tank to block a major government scientific report that sought to spell out the dangers of climate change to Americans.

Conservative Denyers and Delayers are the main reason America lacks the consensus and the political will to take up the fight against catastrophic climate change.

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