Extensively revised, this reference has been expanded to include all aspects of ecology and environmental fields-including pollution, climatology, endangered species, waste disposal, and environmental protection. Clear and simple English is used to present straightforward definitions. Example sentences for each entry, along with grammar notes and parts of speech, make each entry more usable. Encyclopedic comments provide more detail for the complex medical terms. It includes a phonetic pronunciation guide for all headwords, plus sample sentences that are culled from magazines and journals.