Climate change has a cow and worm problem

Cattle graze on a dry meadow at a livestock farm, on August 5, 2020, in northwestern France as a heatwave is forecast for the coming days. | Photo by JEAN-FRANCOIS MONIER/AFP via Getty Images Cows with tummy troubles could be a big problem for the climate, a new study finds. That’s because cattle and other livestock with worms and other parasites produce more of the super potent greenhouse gas, methane, than healthy animals. Methane is 28 to 36 times more powerful than carbon dioxide when