Bottling bovine burps to save planet

Scientists are strapping plastic tanks to the backs of cattle to collect their burps in a novel approach to studying global warming.

Researchers in Argentina say the slow digestive system of cattle makes them a producer of methane, a potent greenhouse gas that gets far less public attention than carbon dioxide.

Scientists around the world are studying the amount of methane in cattle burps and Argentine researchers say they have come up with a unique way.