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

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

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.

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

The great political tragedy of our time is that conservative leaders in America have chosen to use their superior messaging and political skills to thwart serious action on global warming.

If our government won't spend the money to protect New Orleans sufficiently today, what are the chances we will spend the money to protect dozens of coastal cities post-2050, once everyone knows that sea levels will keep rising and intense hurricanes will occur relentlessly?

As long as a handful of U.S. scientists, most receiving funds from the fossil fuel industry, get equal time with hundreds of the world's leading climate scientists, the public inevitably ends up with a misimpression about the state of our scientific understanding.