Lester Brown, president of the Worldwatch Institute, a Washington-based think tank that monitors the state of the environment. The Institute has just issued it's 7th annual "State of the World" report. Brown's been nicknamed "Doctor Doom," for his dire predictions about subjects such as the dwindling forests and the global warming trend. But critics use that term less and less these days as more of Brown's predictions have come true. The 1990 edition of "State of the World" is published by Norton. (Part 2 of a two-part interview. Today, Brown outlines the steps we'll need to take over the next 40 years.)