That’s a best case scenario based on lab results, not feeding cows at scale in the field. The number looks a lot closer to 50% in other trials. In a addition there are tremendous challenges in producing and transporting enough seaweed to implement this even if the kinks get worked out without doing as much damage to the environment.

It’s good to keep all options on the table but seaweed is far from the silver bullet some people want it to be.

Methane also has a much shorter half-life in the atmosphere, though, so just decreasing production of it will have a big effect in the short to medium term.