The words and terms included in this glossary are used in discussing and writing about the environment. Included are certain common words which, while not peculiar to the environment, occur frequently in environmental literature and are important to a student's understanding of pollution problems. The glossary also explains the meaning of words such as dust and abatement as they apply to the environment even though definitions of such words are found in ordinary dictionaries. The object is to make available a single listing to compile and define the most common words and terms essential to the study, understanding and solution of environmental problems.