Talking nice about sun and wind and green jobs is just greenwash.

We are on the precipice of climate system tipping points beyond which there is no redemption.

If we fail to act, we will end up with a different planet.

...chief executives of large fossil fuel companies to [should] be put on trial for high crimes against humanity and nature; [Hansen] accusing them of actively spreading doubt about global warming in the same way that tobacco companies blurred the links between smoking and cancer.

I have been described as the grandfather of climate change. In fact, I am just a grandfather and I do not want my grandchildren to say that grandpa understood what was happening but didn't make it clear.

A level of no more than 350 ppm is still feasible, with the help of reforestation and improved agricultural practices, but just barely - time is running out.

Well, you know what happens to crime when the heat goes up.