This book has been written to help professionals, students, and lay people identify the increasing number of terms in the fields of environmental engineering and science. More than 8000 terms, acronyms, and abbreviations applying to wastewater, potable water, industrial water treatment, seawater desalination, air pollution, incineration, and hazardous waste remediation have been defined. The most unique feature of this book is the inclusion of more than 3000 trademarks and brand names. Many of these commercial terms for proprietary products or processes are so common or descriptive that they have fallen into general use. This confusion is compounded by the fact that many terms contain similar prefixes (., bio-, enviro-, hydra-,.