The operators of a California creamery discovered they could cut the enteric methane emitted on their farm by over half by supplementing the cattle’s diet with red seaweed.

After munching a healthy portion of Asparagopsis taxiformis, cows at the Straus Family Creamery emitted 52% less methane on average during the testing period than when digesting a seaweed-less diet. A methane reduction amounting to as much as 90% was also measured during the trial.