CO2 is the exhaling breath of our civilization, literally... Changing that pattern requires a scope, a scale, a speed of change that is beyond what we have done in the past.

We're operating this planet like a business in liquidation.

There are some bright spots, to be sure, but the internet is still in a Wild West phase, as was the case during the early age of the printing press as well.

Tobacco addiction sinks its claws in deeply, it's just as powerful of [sic] an addiction as heroin or crack cocaine.

You have to rip your opponent's lungs out and then move on.

I don't have the illusion that there's any position or role in the world with as much potential for bringing about change as that of president of the United States.

We sometimes emphasize the danger in a crisis without focusing on the opportunities that are there.