> if this were legitimate, it would be huge news. The first problem is that cattle account for about ~5% of the emissions from industrialized countries. So it'

> if this were legitimate, it would be huge news. The first problem is that cattle account for about ~5% of the emissions from industrialized countries. So it's not actually that high of a priority from a climate standpoint. It's also not the first time that microbial fermentation has been successfully diverted away from methanogenesis; look up "biohydrogen" to find other examples where H2 is the terminal electron carrier instead of CH4 (I assume that happens here; fermentation needs an electron sink). Furthermore, a high proportion of the emissions related to agriculture comprise fertilizer-derived nitrous oxide, which has a longer half-life than methane and is thus more damaging. Further-furthermore, you still have open questions on how this affects long-term health and the rumen microbiome, which simply won't be answered quickly. The smart money IMHO is on lab-grown meat. I expect seaweed may feature into a future market for ethically sourced fancy cheeses, but is unlikely to affect the market for staple foods.