Top Environmental News Stories of 2008

March: Heavy rains lead rivers to flood in Texas, Oklahoma, Louisiana, Arkansas, Tennessee, Kansas, Missouri, Iowa, Wisconsin, Illinois, Indiana, Ohio, Kentucky, West Virginia and Pennsylvania. Crop and property damages are estimated in the billions of dollars. Here, A commercial boat dock is lodged against the Arkansas State Highway 5 bridge in Calico Rock, Ark., Wednesday, March 19, 2008, on the White River. (Kevin Peiper/The Baxter Bulletin/AP Photo )