Just found this via Drudge:
NAIROBI, Kenya (AP) — Air pollution may be just the thing to fight global warming, some scientists say.
Prominent scientists, among them a Nobel laureate, said a layer of pollution deliberately spewed into the atmosphere could act as a “shade” from the sun’s rays and help cool the planet.
Reaction to the proposal here at the annual U.N. conference on climate change is a mix of caution, curiosity and some resignation to such “massive and drastic” operations, as the chief U.N. climatologist describes them.
The Nobel Prize-winning scientist who first made the proposal is himself “not enthusiastic about it.”
“It was meant to startle the policymakers,” said Paul J. Crutzen, of Germany’s Max Planck Institute for Chemistry. “If they don’t take action much more strongly than they have in the past, then in the end we have to do experiments like this.”