Quite frankly, there is no answer to climate change without substantially, dramatically, increasing the amount of renewable energy in the global energy system.

We will move to a low-carbon world because nature will force us, or because policy will guide us. If we wait until nature forces us, the cost will be astronomical.

This is probably the most difficult task we have ever given ourselves, which is to intentionally transform the economic development model, for the first time in human history.

I still do not understand why we don't have people on the streets every single day raising their voices for climate.

We cannot ask others to do what we have not done ourselves.

We have to get to the point where each individual, each corporation, each community chooses low carbon, because it makes fundamental sense. It should become a no-brainer.

DEMAND, PURCHASE & USE LOW CARBON PRODUCTS AND SERVICES. MAKE LOW CARBON SEXY!

When you have a vision of where you need to go, it sounds utopian. But when you get to the tipping point, your understanding switches.

We shouldn't have stupid cars that use liquid fossil fuels. Come on, how outmoded is that? We have to get to the point where this is no longer a part of our experience.

We are just about to cross the 400 parts per million threshold.

Think global, act local.

A positive change in approach improves quality.

The only thing that mattered to me, was the fact that I mattered to you.

Innovation is the creation and delivery of new customer value in the marketplace.

My dad was a diplomat and after living in America, where I was born, he was posted to Cairo.

If we have learned one thing from the history of invention and discovery, it is that, in the long run-and often in the short one-the most daring prophecies seem laughably conservative.

How could I make a little book, when I have seen enough to make a dozen large books?

We've got to unite our country again, because we're stronger when we are united and we are weaker when we are divided.

Sometimes in life, there are no second chances

The world needs you. It needs that special thing you've been dreaming about since you were little.

People may wish to say that the thing that is in conflict with my creativity is not Buddhism - that's fine.