Australian trial of seaweed cow feed fails to achieve hoped-for methane cuts

Longest trial so far of supplement derived from red seaweed produced 28% less of the greenhouse gas - much lower than previous studies

One of the world's longest commercial trials of a seaweed supplement that the global meat industry hopes could slash methane from beef cattle has recorded much lower reductions in the potent greenhouse gas than previous studies.

Putting the supplement into the diets of 40 wagyu cattle in an Australian feedlot for 300 days cut the methane they produced by 28%.