Revised and updated, this sixth edition of a bestseller spans the entire spectrum of environmental science and engineering. Still the most comprehensive, authoritative reference available in this field, the monumental two-volume encyclopedia now includes 89 entries on topics ranging from acid rain, air pollution, and community health to environmental law, instrumentation, modeling, alternative energy, radioactive waste, and water treatment. New entries cover environmental and occupation toxicology, geoengineering, and lead abatement. Featuring expert contributors, this reference provides a view of the field that helps readers understand, manage, and respond to threats to the human environment.