Tuesday, January 19, 2021

Boston Globe: "As the planet warms faster, scientists study controversial ways to lower temperatures"

"As the planet continues to warm at an accelerating rate, scientists are looking into a potential insurance policy, a radical way of curbing climate change by altering the climate system itself.

A team at Harvard University this summer plans to conduct the first of a series of highly controversial tests of what’s known as solar geoengineering, a way to reduce global warming by spreading particles in the atmosphere to reflect sunlight back into space.   
If an advisory board authorizes them to proceed, the scientists plan to travel in June to a remote part of northern Sweden, where they’ll launch a giant balloon into the stratosphere to test whether they can adequately maneuver an instrument-filled gondola suspended below. If all goes well, the team later this year plans for the first time to inject a small amount of calcium carbonate — a common substance found in rocks — into the atmosphere to better understand how the chemical compound might be used to moderate temperatures on the ground."
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