books.google.com - This book presents a collection of ways for individuals and groups to combat specific environmental problems. It is divided into four sections. The first section provides a brief overview of environmental issues including the greenhouse effect, air pollution, ozone depletion, acid rain, extinction, groundwater...https://books.google.com/books/about/50_simple_things_you_can_do_to_save_the.html?id=QAmW33xoc6IC&utm_source=gb-gplus-share50 simple things you can do to save the earth
