What I would say to filmmakers, if I may be so bold or so arrogant, is to draw inspiration from other filmmakers, but go to the place in your own gut where everything is nothing. That's a very Zen thing to say, but that place of nothing is where real creativity comes out of.

In 1998, I was screening 'Good Will Hunting' at Camp David. And I was saying, 'Nice to meet you, Mr. President. Nice to meet you, Mrs. Clinton.' Madeleine Albright, Sandy Berger, Senator Daschle. It was an extraordinary day.

To be sure, governments will remain critical to any comprehensive effort to save our planet.

If you go back and look at President Reagan's speeches, they bring you to tears almost.

Being with Al Gore on the red carpet in Cannes was exciting - he's like a rock star unto himself!

I was with - he wasn't the president then, but - Barack Obama, when he was running, in Washington, during Black Congressional Caucus Weekend, and did a panel about global warming with him. It was almost as if I switched careers for a while, and became a political activist.

I had one of those light bulb 'a ha' moments while screening 'Good Will Hunting' in Camp David in 1998 - Madeleine Albright and the Clintons were there, and I just became really inspired by all of these amazing people. I left the screening asking myself what I could do.