Cows need to reduce gas pains

Global warming is a hot topic, and people all over the world are trying to help cut back on greenhouse gases.

But maybe animals should pitch in too... livestock specifically.

Scientists are calling on farmers to change what they feed their cows to cut back on their "emissions." It's estimated that a single cow can belch out anywhere from 25-130 gallons of methane a day. That's a problem, because methane is about 25-50 times more harmful than carbon dioxide.

Researchers are trying to figure out how farmers can alter the cows' feed, to cut down on those methane "emissions."