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

The idea that China and India will just abandon climate action is not true, because they're doing it for more reasons than we are.

We can no longer imagine that we are part of something larger than ourselves - that is what all this boils down to.

In the United States, cheap fossil fuel has eroded communities. We're the first people with no real practical need for each other. Everything comes from a great distance through anonymous and invisible transactions. We've taken that to be a virtue, but it's as much a curse. Americans are not very satisfied with their lives, and the loss of community is part of that.

The most blatant examples are increased power and frequency in hurricanes and the increased depth and frequency of heat waves.

We're mathematically past the point where the accumulation of individual actions can add up quickly enough to make a difference. The individual action that actually matters is not being an individual. It's joining together with other people in groups large enough to change the political dynamic around climate change.

Permafrost in the soil [is melting], in the boreal and arctic areas in the world, and, probably even more alarming in the last six or eight months, the data on what is happening to the ice shelves in Greenland and the west Antarctic has begun to cause people to radically reassess the earlier conviction that those ice shelves were stable on a kind of century-long time scale.