Geoengineering is a last-ditch option to stall global warming — and it’s getting a first test
Harvard researchers want to see what adding calcium carbonate could do to the stratosphere.
"And while solar geoengineering helps address the
temperature issues related to global warming, that’s hardly the only
concern with climate change. As Irfan notes, geoengineering could threaten crop yields by reducing crops’ access to sunlight, and it does not address ocean acidification, a significant environmental threat associated with climate change.
But if the world continues on its current emissions path,
we might have to choose, in 2030 or 2040 or 2050, between the (quite
bad) option of geoengineering and the (also quite bad) option of
enduring and adapting to the effects of large-scale global warming. And
the Harvard experiment could help us understand which of those two bad
options would be worse."
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