I feel passionate about solving the climate crisis.

When you're going through an emotional experience and you're focussed completely on what's happening, you can't even spare any attention that the camera's there.

We face the gravest threat that civilization has ever confronted. It's global in nature and requires a global solution. Increased CO2 emissions anywhere, whether from China or the United States or from one of the countries that is burning its forests like Brazil or Indonesia.

I was recently on a tour of Latin America, and the only regret I have was that I didn't study Latin harder in school so I could converse with those people.

In a time of darkness, you don't curse the darkness, you light a candle.

A leapord never changes his stripes.

The entire North Polar ice cap is disappearing before our very eyes. It's been the size of the continental United States for the last 3 million years and now 40 percent is gone and the rest of it is going.