We have at most ten years—not ten years to decide upon action, but ten years to alter fundamentally the trajectory of global greenhouse emissions.

- James Hansen

The climate dice are now loaded. Some seasons still will be cooler than the long-term average, but the perceptive person should notice that the frequ…

- James Hansen

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

- James Hansen

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

- James Hansen

We're running out of time.

- James Hansen

The trains carrying coal to power plants are death trains. Coal-fired power plants are factories of death.

- James Hansen

Global warming has already triggered a sea level rise that could reach from 6 metres (19.69 ft) to 25 metres (27.34 yards).

- James Hansen

What we are doing to the future of our children, and the other species on the planet, is a clear moral issue.

- James Hansen

Global warming isn't a prediction. It is happening.

- James Hansen