My parents were true believers in the efficacy of American constitutional democracy, and I was thoroughly inculcated with reverence for what we the p….

We have a planetary emergency. We have to find a way to create, in the generation of those alive today, a sense of generational mission..

Believe in the power of your own voice. The more noise you make, the more accountability you demand from your leaders, the more our world will change….

Some of the most intriguing new research is in the area of extreme weather events and rainfall. A recent study by German scientists published in Clim….

Plant trees, Lots of trees.

I don't really consider this a political issue, I consider it to be a moral issue..

When you look at what has happened over the last few decades the natural fluctuations point in the opposite direction of what has actually occurred. ….

The mountain glaciers in every region of the world are melting, many of them at an accelerated rate, threatening drinking supplies - drinking water s….

Local and state governments have outrun the federal government. The EPA has served notice that it will enact a rule requiring CO2 reductions by major….

If you allow someone like Saddam Hussein to get nuclear weapons, ballistic missiles, chemical weapons, biological weapons, how many people is he goin….

Civil disobedience has an honourable history, and when the urgency and moral clarity cross a certain threshold, then I think that civil disobedience ….

And nobody is talking about taking guns away from hunters or sportsmen or banning all guns. Nobody is talking about that..

If you look at the way all of the new reform movements dedicated to the public interest are living and thriving on the Internet, I do think there is ….

Many of the green places and open spaces that need protecting most today are in our own neighborhoods. In too many places, the beauty of local vistas….

When it comes to climate, we can all make a big difference..

When you talk about President Trump, the cable networks turned over so many hours of prime time to him. Why? Because he was entertaining, but also be….

When energy prices go up, the difficulty of projecting demand also goes up - uncertainty goes up..

Mother Nature does not do bailouts..

You know the old saying: you win some, you lose some... and then there's that little-known third category..

Feb. 9, 1999 Dear Friend, Without your previous support, Bill Clinton and I would not have won our victories for the American people in 1992 and 1….

I had a detailed plan for my life, but it turned out life had a completely different plan for me. And I feel joy that I have work that feels like it ….