Cow burps contribute to global warming. Scientists believe that feeding them seaweed may be beneficial

On a recent winter day, a long line of brown Jersey cows jostled for the place as they waited for feeding time.

Blueberry snorted with anticipation at the end of the railing. Today's dinner at the University of New Hampshire's organic dairy farm was a regular hay and grain concoction.

But, shortly, another component would be added to the mix for her and her fellow dairy cows: seaweed.

This herd is part of ....