I read methane and immediately translated it in my head to "cows" lol. I'm sure the vegans and vegetarians will hate me for saying I do think humans are naturally supposed to eat meat, but nowhere near as much as the typical western diet. The easy answer here (that would also be a lot better for our health) would be to just not eat red meat for every gotdamn meal.
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Vegan here, no hate from me - we can debate your use of the word "supposed" until we both pass out, but at the end of the day, I'm 100% supportive of the "weekday vegan / vegetarian" - people who save meat for weekends/special occasions (and I would strongly encourage those weekend meat eaters to avoid red meat at all times both for their health and the environment).
Would feeding the cows grass instead of corn reduce the methane emissions?
Idk about grass specifically, but generally the answer for most standard cattle feed is no. There are seaweeds that can be added to cow's food that can help reduce methane emissions, but the most successful approach is to just stop eating cows.
There are seaweeds that can be added to cow’s food that can help reduce methane emissions
Seaweed is what the World Economic Forum has been proposing for aprox a decade now. Anything not to stop or even cut down industrial meat production.
That's my understanding, and mainly because more often than not it's a holistic approach (like regenerative agriculture). But some claim that in an industrial setting this is not the case. The problem, I would argue is not really if they eat grass or corn, but where (see industrialization of meat production). This is the part that needs changing to reduce methane emissions.