I recall in the late 1960's we were all worried about something called the Nuclear Winter. After a limited nuclear war, the atmosphere would be polluted with dust stirred up by the nuclear bombs. As we now worry about global warming, I wonder if there is an intermediate stage where some limited particulate matter might be injected into the atmosphere at just the right level to offset warming.
I expect that this is probably infeasible as it would be very difficult to get the balance right.
Sent to New York Times