this post was submitted on 07 Jan 2024
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Discussion of climate, how it is changing, activism around that, the politics, and the energy systems change we need in order to stabilize things.

As a starting point, the burning of fossil fuels, and to a lesser extent deforestation and release of methane are responsible for the warming in recent decades: Graph of temperature as observed with significant warming, and simulated without added greenhouse gases and other anthropogentic changes, which shows no significant warming

How much each change to the atmosphere has warmed the world: IPCC AR6 Figure 2 - Thee bar charts: first chart: how much each gas has warmed the world.  About 1C of total warming.  Second chart:  about 1.5C of total warming from well-mixed greenhouse gases, offset by 0.4C of cooling from aerosols and negligible influence from changes to solar output, volcanoes, and internal variability.  Third chart: about 1.25C of warming from CO2, 0.5C from methane, and a bunch more in small quantities from other gases.  About 0.5C of cooling with large error bars from SO2.

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[–] [email protected] 4 points 11 months ago (2 children)

I feel like you're doing the thing you premptively accused me of wanting to do.

You've put forward an arbitrary unsourced number asserting that 2/3 of the land used for animal agriculture is otherwise useless for food production, with the implication that we would need to use more high quality land to meet human food needs. Thus losing out on any benefits we might get from freeing up this marginal land.

That number is undiscussable until you can actually demonstrate to me how you're arriving at it. We can't have a discussion if you're asking me to work out the specifics of your claim and then disprove them, you have to actually make a specific claim.

Getting into the weeds on the details of soy and hashing over the whole by/co product and economics of various crops with and without animal ag is pointless until we know what it is you're actually claiming.

So please, make that claim. If it is trivial to prove that animal ag uses less land than plant agriculture then do so.

[–] abraxas -4 points 11 months ago

I feel like you’re doing the thing you premptively accused me of wanting to do.

I disagree. You're bringing up those same other issues "in the context of land use" and I'm trying to respond as best I can while sticking to land use.

You’ve put forward an arbitrary unsourced number asserting that 2/3 of the land used for animal agriculture is otherwise useless for food production

Are you saying you contest the 2/3 number straight out? Because your previous reply seemed to be trying to gather ammo to object to it with supplemental data.

with the implication that we would need to use more high quality land to meet human food needs

I actually didn't make that implication. As "it's ok to keep eating meat" is the defacto winner, I'm simply pointing out that anti-meat advocacy has not resolved the marginal land issue with their land use objections.

That number is undiscussable until you can actually demonstrate to me how you’re arriving at it

Alright. So is your position that there is no such thing as marginal use land, or that there exist no cows on it? If we "undiscuss" that number for a moment, are you willing to concede the only point I made - that livestock on marginal use land is perfectly fine from an environmental point of view?

We can’t have a discussion if you’re asking me to work out the specifics of your claim and then disprove them, you have to actually make a specific claim.

My claim is that the vegan argument on marginal land hasn't defended their claim. I have argued that claim, and you're harping on a number you both believe enough to try to argue around and disbelieve enough to pretend it's impossible to discuss marginal land use without me somehow proving the number is exactly correct.

Does the 2/3 number matter to you, or doesn't it? Do you believe it, or don't you? If the former, maybe we can have a discussion on exactly how we can determine how much livestock is on marginal land. If the latter, perhaps we can focus on whether livestock on marginal land is horrible for the environment or not.

Getting into the weeds on the details of soy and hashing over the whole by/co product

I really didn't. You made the claim that soy represents secondary land use, one I took seriously enough to reply while pointing out how the reply can lead to tangents, so we can stick to the argument. ANOTHER person, in response to me (and maybe you) provided far more tangential, but effective, an argument against you, but I am not that person.

So please, make that claim

Which claim are you asking me to make now? Can we finish the claim "vegans haven't proven that livestock on marginal land is terrible for the environment" first?

[–] [email protected] -5 points 11 months ago (1 children)

I think the whole issue is that this is more complex than any discrete set of metrics because so many industries are interconnected. in a world without any animal agriculture, how much corn and soy would we raise? it is just unknowable.

[–] [email protected] 4 points 11 months ago

I'm out doing grocery shopping so replies are flakey. I want to avoid confusion between inexact and unknowable.

We can establish the difference between plausible and implausible thing, and rule out the impossible.

We know that historically and contemporarily crops are favoured over animal ag (with the exception of a few things like chickens widely, and sometimes cows/goats/or camels in particular niches) by subsistence farmers and poor urban workers. That meat is expensive, and only recent developments (and subsidies) have really changed that in the global north/west/rich mc exploity whitey land whatever you want to call it.

So while it's not impossible that modern developments have somehow dramatically changed things in terms of efficiency, or that poor people are idiots and don't know what to grow to survive (highly unlikely, subsistence farming kills the idle or wrong), or that in some weird niche in Shenzhen farming the Peruvian fluffy marmoset is particularly efficient: there's probably some sensible conclusions we can draw about what an optimally land efficient agriculture could and could not look like and it seems unlikely to be animal ag centric or even particularly heavy.