Grazing Cattle (IMAGE) University of California - Davis Caption Beef steers graze on a ranch in Dillon, Montana. The machine nearby releases a seaweed supplement while also measuring the cattle's methane emissions. (Paulo de Méo Filho / UC Davis) Credit Paulo de Méo Filho / UC Davis Usage Restrictions Use with credit. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.