Corporate polluters, their phony think tanks and political toadies like to marginalize environmentalists as tree huggers, or radicals. But there is nothing radical about clean air or water.

Everyone knows that we're doing a science experiment with Earth. And the No. 1, No. 2, No. 3, No. 4 contributors to it are the mining and burning of coal.

Industrial agriculture now accounts for over half of America's water pollution. Two years ago, Pfiesteria outbreaks connected with wastes from industrial chicken factories forced the closure of two major tributaries of the Chesapeake and threatened Maryland's vital shellfish industry. Tyson Foods has polluted half of all streams in northwestern Arkansas with so much fecal bacteria that swimming is prohibited. Drugs and hormones needed to keep confined animals alive and growing are mainly excreted with the wastes and saturate local waterways.

I was interested in the environment from when I was a little kid. I spent most of my time hunting and fishing and kayaking.

Investigative journalism has been relegated to a very, very tiny space in America. We don't really have much investigative journalism left. And the last refuge for it is documentary filmmaking.

I think we as Americans know there's a much better alternative than the 17th century practice of burning rocks to power our economy.

Of the seven million Americans living abroad, one million are military, and not all of them are Republicans. The other six million are overwhelmingly Democrat because people who live in foreign countries have a much different perspective as to what is happening in our country.