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I meant CH4, and the problem is not the ranching it's the cereal production to feed cows.
The beef lobby claim
The problem is the 7% of corn acres?
Does the bacteria in the cow that releases methane, release more methane than would be released by the natural decomposition of the forage material?
I don't know how the beef lobby computes it (and whether they import cereal from foreign countries) but if you take account for all animal feed (not just beef) it is more than 7%:
https://ourworldindata.org/grapher/share-cereals-animal-feed?tab=chart
Honestly I don't know but the point is not to let the cereal decompose, that would be dumb. It's to use those lands to produce something else, something that wouldn't produce any CH4 and ideally that would absorb a bit of it. Anyway it would be better to burn the cereals and to produce energy with it (we get no CH4 - worse than CO2 - and more energy).
This paper https://www.nature.com/articles/s43016-022-00589-6
has a nice visualization of the flows of inputs.
/images/1714930968548955.webp
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I believe the bacteria in cows produce less methane when fed corn than their typical forage. The forage would decompose releasing methane if not eaten by cows. Cattle graze and forage on land unsuitable for other uses. We may get the CH4 anyway and there would be no beef. Deer, elk, bison and moose may then forage the areas with the cow deficit.
Yes but we wouldn't produce the forage in the first place. Or you can burn it to produce energy (and CO2 is still better than CH4)
Much of the the forage would exist in any event.
You can feed it to some other animal then, the cow is the worse.
https://ourworldindata.org/carbon-footprint-food-methane
While I enjoy the image of chicken drives with mounted riders moving their
herdsflocks of chickens from pasture to pasture I suspect there are reasons this isn't done.Absent cows it's more likely the forage would be consumed by other existing ruminants, bison, deer, elk, moose, etc.
The reason is that people eat a lot of beef. Farmers don't try to optimize the environmental impact of our food, they optimize their revenue (and they are right to do so).
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That EA paper I linked suggested that the reclaimed land be paved over to reduce "wild animal suffering." Because if the earth is a lifeless void there will be no suffering.
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