The United States could dramatically reduce its carbon emissions per kilowatt-hour without raising its overall energy bill.

We have been getting rich by depleting all our natural stocks - water, hydrocarbons, forests, rivers, fish and arable land - and not by generating renewable flows.

In 2003... the White House conspired with an oil-company funded think tank to block a major government scientific report that sought to spell out the dangers of climate change to Americans.

Would PBS go so far as to give air time to an even more extreme kind of disinformer, a Holocaust denier?

We created a way of raising standards of living that we can't possibly pass on to our children.

Time is short. We have at most a decade to sharply reverse course.

The entire western Siberian sub-Arctic region is melting, and it has all happened in the last three or four years.