Long-Term Study Shows Feeding Cattle Seaweed Reduces Greenhouse-Gas Emissions by 82%

Researchers at the University of California, Davis, published results of a long-term study in the journal PLOS ONE, showing that feeding beef cattle red seaweed could reduce methane emissions by as much as 82%. Scientists found that feeding cattle 80-gram (3-ounce) doses of seaweed daily for five months did not affect weight gain, but reduced methane emissions dramatically. Scientists found no drop-off in efficacy of the seaweed supplement over time. The next step for researchers is to find a way to farm the type of seaweed used in the tests, because there is not enough of it available in the wild to allow broad application to cattle diets.