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.

It is a complete embarrassment and literally shameful that the country that first of all invented environmentalism and gave it to the world, and second of all did all the science originally around climate and global warming and presented that to the world, has been the country that has refused to participate in a constructive way to the solution.

A voluntary simplification of life-styles is not beyond our abilities, but it is probably outside our desires.

The roof of my house is covered in solar panels. When Im home, Im a pretty green fellow.

Alone among businesses, the fossil-fuel industry is allowed to dump its main waste, carbon dioxide, for free.

Look - every time is the wrong time and the perfect time to have a kid, and you just do it when you can.

In the end, climate change is a math problem.