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

I think we have a very brief window of opportunity to deal with climate change. No longer than a decade at most..

The United States did not sign Kyoto, yet its emissions are not that different from the countries that did sign it..

Because cap and trade is enforced through the selling and trading of permits, it actually perpetuates the pollution it is supposed to eliminate..

There is still time to act and avoid a worsening climate but we are wasting precious time..

As you get more global warming, you should see an increase in the extremes of the hydrological cycle - droughts and floods and heavy precipitation..

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

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

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

Imagine a giant asteroid on a direct collision course with Earth. That is the equivalent of what we face now with climate change, yet we dither..

The fact is fossil fuel carbon will stay in the surface climate system for millennia..

The urgency derives from the nearness of climate tipping points..

We're handing them [young people & future generations] a climate system which is potentially out of their control. We're in an emergency: you can see….

The last time the world was three degrees warmer than today-which is what we expect later this century-sea levels were 25m higher. So that is what we….

The scientific excitement in comparing theory with data, and developing some understanding of global changes that are occurring, is what makes all th….

We have to, in the next ten years, begin to decrease the rate of carbon dioxide emissions and then flatten it out. If that doesn't happen in ten year….

The danger is that the compromises and special interests inherent in Kyoto-style targets and cap-and-trade will be accepted because of bureaucratic m….

As a government employee, you can't testify against the government..

Injection of environmental and political perspectives in midstream of the science discussion cannot help the process of inquiry. I believe that perso….

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..….

Interference with communications of science to the public has been greater during the current administration than at any time in my career..