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

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.

Think global, act local.

Forgiveness is freedom. It's something you do for yourself - to keep who you are intact. Now that I think about it - in some ways, it's kind of a selfish act.

Can one mistake really destroy a lifetime together?

Beauty fades, but knowledge is eternal

I think everybody at some point in time has thought to themselves, "I have a really great idea for a restaurant."

And though the newspapers called the shooting the Crime of the Century, Goldman knew it was only 1906 and there were ninety-four years to go.

From Paris we took the Orient Express to Vienna. I must say I was terribly disappointed; nobody was murdered on the train.

Yelp is in a very nice spot: local data, and especially review data, is one of the killer apps on mobile phones.

Are we not also married to conscience which we would love to get rid of often enough since it is more bothersome than a man or a woman ever could become?

It may be taken for granted that, rash as the Americans are, when they are prudent there is good reason for it.

There's hardly anywhere in literature where you don't find a triangle.