Think Like a MountainIn twenty short books, Penguin brings you the classics of the environmental movement. In this lyrical meditation on America's wildlands, Aldo Leopold considers the different ways humans shape the natural landscape, and describes for the first time the far reaching phenomenon now known as 'trophic cascades'. Over the past 75 years, a new canon has emerged. As life on Earth has become irrevocably altered by humans, visionary thinkers around the world