This book is the third in a series of discussion materials, this issue being part of an action project to increase environmental awareness. Over 60 readings are included that cover a wide variety of opinions and interpretations of specific environmental problems and related philosophic issues. Examples of topics discussed include population, land use, urbanization, consumer needs and welfare, pollution, technology, and energy crisis. Authors such as John Quincy Adams, Arnold Toynbee, Henry David Thoreau, and others add historical background to current problems. (LS)