“It's not normal that, when you close your eyes and listen to the news, too often…” — John F. Kerry

President Obama and I both believe we don't have time for a meeting anywhere of the Flat Earth Society.

It's not enough for one country or even a few countries to reduce emissions when other countries continue to fill the atmosphere with carbon pollution as they see fit.

The solution to climate change is staring us in the face. It's energy policy. If we pursue a global clean-energy economy, we can cut dramatically the amount of carbon pollution we emit into the atmosphere and prevent the worst impacts of climate change.

Democracy relies on free speech. Yes, say anything you want, but it relies even more on the speech being truthful. It is the truth, after all, that sets us free.