this post was submitted on 15 Aug 2024
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Climate - truthful information about climate, related activism and politics.

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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.

Recommended actions to cut greenhouse gas emissions in the near future:

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[–] GBU_28@lemm.ee 7 points 2 months ago (6 children)

As long as residents have access to local, durable energy generation that isn't at risk of outages: very cool.

[–] spidermanchild@sh.itjust.works 6 points 2 months ago (1 children)

That's where local battery storage/EVs come in. Also passivhaus in and of itself is a form of resiliency - if the power goes out during a cold snap, the house will stay warm for quite some time, and the dozen kWh in a battery or the several dozen in an EV go alot further. Efficiency has a multiplying effect.

[–] GBU_28@lemm.ee 2 points 2 months ago* (last edited 2 months ago) (1 children)

Absolutely, that's exactly what I'm talking about.

One of the current benefits of having natural gas piped into a house is having a completely distinct power supply system, where one could cook, heat the home, heat water (sanitation), power a generator (plumbed in line), etc.

I'm not saying this is a bad project, I'm just saying that is an adoption challenge to be addressed (resiliency, failover)

[–] spidermanchild@sh.itjust.works 3 points 2 months ago (1 children)

Right, but remember only like 60% of homes have gas anyway, so that's not necessarily the baseline from a resiliency perspective. And a huge chunk of those aren't actually prepared to operate without electricity either. So while I agree that resiliency is worth focusing on, we should also look holistically about what gas can/cannot do and the associated costs relative to electrification/solar/storage. A modern gas home will still need a backup generator to run condensing hot water/furnace and there's a significant cost to whole home generators, so it's not all fun and games just having gas appliances.

[–] GBU_28@lemm.ee 2 points 2 months ago (1 children)

Yep. We just installed a small generac to support us during increasingly regular power outages, with automatic failover. 7k all in.

This is in addition to a small thermal solar array, and a small pv solar array with 5kwh (but expandable) storage that we previously had.

So as you can imagine, resiliency is high on my mind lol

[–] spidermanchild@sh.itjust.works 2 points 2 months ago (1 children)

It's a fascinating topic. It's top of my mind too - we have had very reliable power historically (Colorado) but in the last year had a major preemptive wildfire shutdown and a few other shutdowns (whereas literally less than 5 minutes of outage the last decade). I also got rid of my gas service last year and fully electrified. I have solar, but was waiting until battery prices dropped before going that route. Figured I'd yolo in the meantime, but that assumption has me increasingly on edge. From a climate perspective, I do hate to see a renewed interest in gas but I get why. We need cheaper batteries and standardized V2H/V2G asap.

[–] GBU_28@lemm.ee 2 points 2 months ago
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