The California state Department of Food and Agriculture has approved the use of a seaweed feed additive that can reduce methane emissions from cows and contribute to the fight against climate change.

A public benefit company based in Hawaii, Blue Ocean Barns, is producing the feed additive from a variety of red seaweed called Brominata. The supplement has now been approved for use on both conventional and organic dairy farms in California, which produces more cow’s milk than any other state in the US.

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