The crossword solution for the term 'ANTIPOLLUTION PREFIX' is ECO, which is a three-letter prefix. ECO is derived from the Greek word oikos, meaning 'HOUSE, ' and is used to refer to environmental protection and conservation. ECO is often used as a prefix in terms related to environmentalism, such as ecotourism, ecology, and ecopolitics. ECO is also used as an abbreviation for economics, which is the study of how people use resources to produce goods and services.