In twenty short books, Penguin brings you the classics of the environmental movement.With the precision of a scientist and the simplicity of a fable, Rachel Carson reveals how man-made pesticides have destroyed wildlife, creating a world of polluted streams and silent songbirds.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 have raised their voices to defend the planet, and affirm