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Gassy cows are warming the planet, and scientists are turning to the sea for answers

California might be able to meet ambitious methane reduction goals by making cows less gassy.

Luke Gardner is a California Sea Grant aquaculture extension specialist at the Moss Landing Marine Lab with a creative solution to the growing problem of cow burps, which release the potent greenhouse gas, methane. Previous research has shown that certain seaweeds can alter cow digestion in lab experiments and reduce the production of methane gas by 99%, but will native California seaweeds have the same effect?

Gardner seems well suited to lead the Ocean Protection Council funded research project, which is administered by California Sea Grant. He spends his weekends raising beef cattle in the rolling hills of Carmel Valley, just east of Monterey Bay. This status as scientist-who-moonlights-as-rancher gives him perspective on the issue from multiple angles. As a scientist, he recognizes the importance of reducing greenhouse gasses, but as a cattle rancher, he sees the gassy digestion as lost energy which leads to lower productivity for the rancher. Soothing a cow’s digestion could not only reduce methane emissions, but also help them metabolize their food more efficiently…

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