People don't want to change. It's hard for people to change and it's hard for businesses to change. If I was running an oil company, I would be resistant to change too.

The two most abundant forms of power on earth are solar and wind, and they're getting cheaper and cheaper.

For my own health, I thought it was better to eat a plant based diet. I'm going to be 60 soon and I have boundless energy and I feel really good, so I'm all for it.

People are overwhelmed looking up at the Mount Everest of environmental challenges that we face. But you put one foot in front of the other and you recognize that not everyone is Sir Edmund Hillary.

I wanted to be an actor my whole young life. My dad was an actor, obviously - he won an Academy Award, but I had no idea what was involved. I had all the wrong ideas about acting.

I'm a strong proponent of green tech for anyone who can afford it, having spent the last 40 years working toward achieving a smaller and smaller eco-impact for myself.

There are many different ways now to experience nature. Get out there and hike.