Green Gray Areas Books that question the conventional wisdom on the environment. BY MICHAEL CRICHTON Saturday, October 29, 2005 12:01 a.m. EDT 1. "Playing God in Yellowstone" by Alston Chase (Atlantic Monthly Press, 1986). That raw sewage bubbles out of the ground at Yellowstone National Park--after more than a century of botched conservation--would come as no surprise to Alston Chase, who 20 years ago wrote "Playing God in Yellowstone: The Destruction of America's First National Park." Mr. Chase, a former professor of philosophy turned journalist, presents a clear critique of ever-changing environmental beliefs and the damage that they have caused...