(note: In an unrelated article about oceans absorbing carbon, this excerpt reveals what else some scientists have been focusing on. from 10/22/07 article in The Sydney Morning Herald)
[A] proposal to alter the weather has been made by US and Israeli scientists, who have revealed plans to weaken hurricanes and steer them off course to prevent tragedies such as Hurricane Katrina.
The $US41 billion of damage done to New Orleans in 2005 has spurred two rival teams of climate experts to step up their efforts to enable people to play God with the weather.
Under a scheme proposed by the Massachusetts Institute of Technology, aircraft would drop soot into the near-freezing cloud at the top of a hurricane, causing it to warm up and so reduce wind speeds.
Computer simulations of the forces at work in the most violent storms have shown that even small changes can affect their paths - enabling them to be diverted from big cities.
Last month scientists at the Hebrew University of Jerusalem said they had simulated the effect of sowing clouds with microscopic dust to cool the hurricane's base, also weakening it.