Right, but then focusing on methane - on the potential effect on climate - is the wrong factor to focus on. The correct focus is the land itself. That's because the effect on climate and climate itself are merely intermediates.
Also, I use boolean logic and truth value to look at the problem, not math. For example, which is more likely, that we got perfect climate and nothing to eat, or perfect climate and plenty to eat? We could call this the Gaia principle, where Gaia provides for all, but only if it remains Gaia, and this can only happen if all are provided for. It's a loop, not end-points.
Also, it's not a closed system where only events on the planet have any effect on the planet. There's the sun, the single most powerful entity (or factor) not on the planet. There's cosmic rays, the second most powerful entity (or factor) not on the planet. Combine the two, nothing on the planet can beat that, or more to the point, nothing on the planet can have any effect stronger than that either way for better or worse. Indeed, it's thought that there's a very strong correlation between cosmic rays, solar wind, Earth magnetic field, cloud cover, and Earth climate especially land/surface temperature where it matters most for our purpose. It's even possible that this correlation is an a priori to the whole problem - it starts with cosmic rays, ends up with greenhouse gases, hence the other correlation between greenhouse gases and climate. We can even see this with other planets where there's extreme greenhouse effects like Venus for example, where the impetus isn't greenhouse gases, but the planet's position closer to the sun.
Taubes often explains how obesity is not a cause of the diseases associated with it, it's a parallel effect of the same cause. Well, maybe that's what's happening with climate too - parallel effects of the same cause. Of course, we can't blame that for the fossil fuels we dig up, cuz we dig them up, ya? We can't blame that for CAFOS cuz that's also our own doing. But then we're just a speck compared to the sun and cosmic rays.
Since we're just specks in the grand scheme of things, maybe we should focus on our own state of being instead of the planet's. So, eat meat or not, choose according to what's best for you directly. Based on that alone, it's much more likely that meat raised on pasture and grassland is just the way to go. So even here, based on the same boolean logic and truth value I use to look at the problem but from a different angle, I end up with the same solution.
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