Global Warming - Our Environment Author:Peggy J. Parks Scientific evidence shows that the Earth is growing warmer. Since 1900, the average global temperature has increased by about one degree Fahrenheit, and this is called global warming. Scientists disagree about its cause and whether or not it is harmful. This book examines different points of view on global warming, including different perspectiv... more »es on how it can be stopped--and whether it should be stopped.« less