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Pastimes : All Things Weather and Mother Nature
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From: Don Green10/8/2023 10:37:58 AM
   of 937
 
It’s Time to Engineer the Sky Global warming is so rampant that some scientists say we should begin altering the stratosphere to block incoming sunlight, even if it jeopardizes rain and crops

The idea that humans can change the planet's atmosphere for their own purposes has a long history. In 1962 the U.S. military started Project Stormfury, an attempt to weaken hurricanes by seeding their clouds with silver iodide particles. From 1967 to 1972 the U.S. Air Force dabbled in weather-control warfare over Vietnam and Laos; in a highly classified effort called Operation Popeye, several aircraft flew daily missions to spray lead and silver iodide powder into monsoon clouds. The goal was to increase rainfall, which would muddy up the Ho Chi Minh Trail, a network of coarse roads, interrupting Vietcong supply lines.

Almost as soon as scientists understood that rising CO2 could warm the planet, some of them proposed making Earth more reflective to counter the effect. In 1965 scientists reported to President Lyndon B. Johnson that warming caused by rising CO2 could be addressed by spreading reflective particles across the oceans. In 1974 Russian climatologist Mikhail Budyko suggested that injecting SO2 into the stratosphere via aircraft or rockets could reflect sunlight. This technology, he wrote, “should be developed without delay.” Perhaps surprisingly, these proposals did not include the idea of reducing emissions.

scientificamerican.com
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