A world where one tenth of the population gets to be extremely wealthy, and six tenths very poor, is not, in the long run, a stable place.

Climate change is the single biggest thing that humans have ever done on this planet. The one thing that needs to be bigger is our movement to stop it.

The technology we need most badly is the technology of community, the knowledge about how to cooperate to get things done.

Very few people on earth ever get to say: 'I am doing, right now, the most important thing I could possibly be doing.' If you'll join this fight that's what you'll get to say

what you do every day is what forms your mind and precious few of us can or would spend most days outdoors.

In 50 years, no one will care about the fiscal cliff or the Euro crisis. They'll just ask, "So the Arctic melted, and then what did you do?"

Global warming is no longer a philosophical threat, no longer a future threat, no longer a threat at all. It's our reality.

Advent: the time to listen for footsteps - you can't hear footsteps when you're running yourself.

We've been given a warning by science, and a wake-up call by nature; it is up to us now to heed them.

The real negotiation is between humans on the one hand and chemistry and physics on the other. And chemistry and physics, unfortunately, don't bargain.

We can either save the planet from catastrophic warming, or protect fossil fuel CEOs. Not both. Do the math(s)

I don't wish to be everything to everyone, but I would like to be something to someone.

He announces that lately he keeps losing things. "Like your wife and child, " I want to say, but don´t. At fourty, I´ve learned not to say everything clever, not to score every point.

A prototype is a question embodied

I love pink - pink's my favourite. I hardly ever - weirdly - wear it, but I love the colour pink.

I did not wish to live what was not life, living is so dear; nor did I wish to practice resignation, unless it was quite necessary.

I dislike pastiche; it attracts attention to the language only.

It is sinful for students to badmouth their teachers and sinful for teachers to mislead their students.

Y'know, Nature's unpredictable -- that's why we had to tame her. Maybe we went too far, but in principle we made the right decision.

Yet, most of the readily accessible reserves of oil formed over hundreds of millions of years will be consumed within a single generation, spanning the years from 1960 to 1995.

When we love - we grow