Injection of environmental and political perspectives in midstream of the science discussion cannot help the process of inquiry. I believe that persons with relevant scientific expertise should concentrate, with pride, on cool objective analysis, providing information to the public and decision-makers when it is found, but leaving the moral implications for later common consideration, or at most for summary inferential discussion.

If we drive our fellow species to extinction, we will leave a far more desolate planet for our descendants than the world we inherited from our elders.

'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.

The question is not whether to close the parks, but how to accomplish this goal.

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

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

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