"One way to curb global warming is to purposely shoot sulfur into the atmosphere, a scientists suggested today.

The burning of fossil fuels releases carbon dioxide, a greenhouse gas, into the atmosphere. It also releases sulfur that cools the planet by reflecting solar radiation away from Earth. "

http://news.yahoo.com/s/space/20060727/sc_space/scientistinjectsulfurintoairtobattleglobalwarming