Comptroller General Report on cloud-seeding activities carried out in the United States
May 31, 1972
Pursuant to the specific questions contained in your request, we directed our review
toward developing information on cloud-seeding programs supported by Federal agencies,
on the cost and purposes of such programs, on the impact of cloud-seeding on precipitation
and severe storms, and on the types of chemicals used for seeding and their effect on the
environment.