Never doubt that a small group of thoughtful, committed citizens can change the world; indeed, it's the only thing that ever has.

Sooner or later, we will have to recognise that the Earth has rights, too, to live without pollution. What mankind must know is that human beings cannot live without Mother Earth, but the planet can live without humans.

We may achieve climate, but weather is thrust upon us.

The Earth does not belong to us: we belong to the Earth.

We're running the most dangerous experiment in history right now, which is to see how much carbon dioxide the atmosphere... can handle before there is an environmental catastrophe.

The environment is everything that isn't me.

The time is right for electric cars - in fact the time is critical.

When we try to pick out anything by itself, we find it hitched to everything else in the universe.

We don't have to sacrifice a strong economy for a healthy environment.

We have enslaved the rest of the animal creation, and have treated our distant cousins in fur and feathers so badly that beyond doubt, if they were able to formulate a religion, they would depict the Devil in human form.