'Goals' and 'caps' on carbon emissions are practically worthless, if coal emissions continue, because of the exceedingly long lifetime of carbon dioxide in the air.

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

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

The five warmest years over the last century occurred in the last eight years.

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

In view of the immense power of natural weather and climate fluctuations and the great buffering capacity of the Earth, especially the ocean, it is easy to be skeptical about whether small anthropogenic changes of atmospheric composition can have important practical impacts.

...the global surface albedo [surface whiteness] and greenhouse gas changes account for practically the entire global climate change.