The number of biology-related issues in our society is growing constantly. This book helps readers digest a wealth of scientific information with relevant references and examples. Includes new Links to Life feature ends each chapter on a relevant note with short, informally written segments on familiar topics, such as " Health Food." Contains Earth Watch, Health Watch, and Scientific Inquiry Essays that introduce readers to the exploration of key environmental and health-related issues. Features a striking illustration program with consistent, strategic use of color, revised multi-part figures, and updated labels and captions. A fascinating reference for anyone interested in learning more about biological issues in our world.