anti-smog

adjective
an·​ti-smog | \ ˌan-tē-ˈsmäg How to pronounce anti-smog (audio) , -ˈsmȯg, ˌan-tī-\
variants: or antismog

Definition of anti-smog

: designed to reduce pollutants that contribute to the formation of smog He calls for stricter inspection programs to ensure that auto antismog equipment is in working order …— Gregg Easterbrook

First Known Use of anti-smog

1940, in the meaning defined above

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