"The world is a much more hopeful place because of the work and life of Lester Brown. World on the Edge should be read by everyone who wants to see a better life for their children, which is just about everybody." —Ted Glick, Policy Director of the Chesapeake Climate Action Network
Now in its 43rd year, Earth Day has become an international day dedicated to promoting environmental awareness and action. Lester Brown explains what's changed, as concern about climate change and green energy have come to the forefront of the movement.