I am not. No need. You posted a better source this time. Not a great source, but a better source. Read what it says. So they conclude that the benefit of grazing cattle is not large enough, nor possible on a large enough area of the planet, to offset AGW. It's possible they are right. AND????
Just because the car you bought might not go 100 mph, and the best you can get it to go is 60 mph, doesn't mean you can't move forward at all.
We both know CAFOs are a huge emissions source. Eliminating them and replacing them with a animal husbandry model that sequesters carbon, even if it might or might not be enough to completely reverse AGW, is still a step in the right direction.
Personally I happen to agree that it isn't completely proven HM can completely reverse AGW. I think it is likely, others say unlikely to benefit more than 10-30 %. It's still a benefit, unlike CAFOs which are actually helping to cause AGW.
This study shows the natural wild grassland/grazer biome does force climatic cooling.
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This study shows that on HM land, mimicking that lost wild biome can have a similar effect of increasing C in soils (reducing greenhouse gasses)
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Here is another study that confirms that effect and even confirms the effect is better than no grazing at all.
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This university extension guide explains how to use the effect to benefit other wildlife as well.
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This university extension guide explains how a farmer can use it at a profit, requiring no massive multi trillion dollar subsidies from society.
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This USDA case study shows how it can be integrated with crop production to turn those soils into a net carbon sink as well as increasing crop yields.
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This article by a well respected science writer shows that the scientific community, rather than regarding it as woo, actually is taking the concept very seriously.
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So yeah, the current models of animal husbandry most commonly used around the world are part of the problem, a major part as you eloquently argued in your OP. However, that doesn't mean that the only solution is to eliminate all domestic food species of animals. There is another solution, and that is changing the way they are raised to something that instead of degrading the environment, restores it.