Abandoned mine could yield clues to stopping global warming

An abandoned mine in California is providing scientists with important data that could lead to a possible new weapon to fight global warming.

Massive amounts of the greenhouse gas carbon dioxide vacuumed from smokestacks or the air could be permanently locked up in a type of tight, magnesium-rich rock found in the mine, according to scientists. One tricky part is to break up the rock to make room for the greenhouse gas. And that may require violence.