Since the release of An Inconvenient Truth, Al Gore has had quite a run. He first won himself an Emmy, then an Oscar, and now the Nobel Peace Prize. Although the film represents Gore's most well known work on the environment, it's hardly where his environmental efforts began. His campaign goes back to the late 1970s, when he held congressional hearings on climate change and greenhouse gases. And it moves through the 1980s and then the 1990s, when he occupied the Vice Presidency. In 1992, while other political leaders quibbled over the pros and cons of NAFTA, Gore put the environment on the national agenda, really for the first time, when he published Earth in the Balance: Ecology and the Human Spirit. (The Bush administration then took it off the agenda, regrettably.) Gore's book became a national bestseller, and it has since gone through several new editions, the latest having been issued just last year. You could buy the book, but the good news is that Google serves up large portions of the book online for free. It's at a price you can't beat, and it goes easy on the pulp. Have a good look. And also see below Gore's comments upon learning about the Nobel Prize.