"What Have They Done to the Rain" is a song by Malvina Reynolds.
Composed in 1962 and first entitled "Rain Song", it was written as part of a campaign to stop nuclear testing in the atmosphere, which was producing fall-out.
The song was recorded by The Searchers, reaching number 29 on the U.S. charts and number 13 in the UK in 1965. It has been recorded by many other artists including The Seekers, Marianne Faithfull, Joan Baez, and Melanie.
It was also covered by actress Lili Taylor in Nancy Savoca's film Dogfight.