1970s United States: Roy evans, in command of EPA helicopter operations for the project, talks with pilot after day's flight during heavy smog attack. helicopters are based at an old Nike launching site at El Monte ca. 1973

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Size: 1886px × 2808px
Photo credit: © Hum Images / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 1970s, america, archival, environment, environmental, epa, helicopter, historical, history, pollution, preventing, protecting, research, smog, states, testing, united, vintage, weather