Chinese scientists find good use for cigarette butts

May 22, 2010, 3:00 PM — With 300 million smokers, China is the world's largest consumer of cigarettes -- and that means plenty of cigarette butts lying around. Is there some more efficient way to deal with them than just dumping them into a landfill? One research group has found that the toxic chemicals therein can be used to keep water pipes from corroding. Read more...