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

Adding CO2 to the air is like throwing another blanket on the bed.

The forcings that drive long-term climate change are not known with an accuracy sufficient to define future climate change.

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

Policy decisions on climate change are being deliberated every day by those without full knowledge of the science, and often with intentional misinformation spawned by special interests.

The climate system is being pushed hard enough that change will become obvious to the man in the street in the next decade.

It has become very difficult for anyone to argue that observed global warming is natural variability. We have good reason for being able to say that the world will be warmer by about a quarter of a degree in the next decade. It's the same reason we had 10 years ago when we said that the 1990s would be warmer than the 1980s: The planet is out of equilibrium.