this post was submitted on 31 Jul 2023
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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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Climate scientists: concept of net zero is a dangerous trap (theconversation.com)
submitted 1 year ago by [email protected] to c/[email protected]
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[–] BackupRainDancer 1 points 1 year ago* (last edited 1 year ago)

Yeah, I saw some of your other comments regarding the 3rd world tree offsets. Definitely the shady recs I was talking about. The shady req pushers drive me nuts, the legislation on what you can and can't count is usually pretty clear but they're just spam. I would love to see govt action against them

Usually net zero claims are claimed by a certain date so I'm unsure if you're saying your company thinks it's at net zero (very few are as outlined in most govts reporting reqs) or they have a commitment and are claiming Z% progress. This is also a good example of the balkinization of terms. Net zero to me means "company no longer emitting in scope 1 and 2 by x year".

If it's the latter that's where the whole review and pushback on net zero as a marketing term is, some of these companies just went out and bought up all the renewable energy on the market, didn't touch anything they cant just buy and are now bitching they don't get to claim net zero progress. I agree with the committees, fuck those companies. If you're not putting in the work then you shouldn't be able to claim that.

Re: the new system, you're describing the concept of additionallity to the power grid as well. We will ultimately reach a point where we've only got thinga like new growth forests or some other carbon sequestration but we've got a really long way to even shut off the flow of CO2.

Right now a lot of focus is on getting scope 1 and 2 emissions to 0 (what you consume vs purchase for raw energy) vs scope 3 (all your suppliers and users emissions too). I believe you may be describing a Scope 3 CO2 neutral. In which case I agree, but goodluck getting most of our politicians right now to agree.

It's not the perfect end goal but the logic goes that if every company has to get to net zero via supply chain and adding to the grid, we might see scope 3 hit zero with additional crack down on laggards?

Editing: just to add that interim usage of biogenic fuels is a good way to cut CO2 and only release CH4 and N2O in very very limited quantities (from what I've seen usually less than those in non biogenic sources). theoretically committing capital to plant or grow these sources now could be used to "reduce" carbon impact in future supply chains. Probably has some issues.