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

Coal is the single greatest threat to civilization and all life on our planet.

It's as certain that as long as fossil fuels are the cheapest energy, we will just keep burning them.

We cannot afford to put off change any longer. We have to get on a new path within this new administration. We have only four years left for Obama to set an example to the rest of the world. America must take the lead.

...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.

What has become clear from the science is that we cannot burn all of the fossil fuels without creating a very different planet.

It would be immoral to leave young people with a climate system spiraling out of control.