this post was submitted on 05 Mar 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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[–] [email protected] 38 points 11 months ago (12 children)

Nuclear power is still better than burning fossil fuels regardless, and probably has a role to play as a scaleable demand-responsive source.

However for the past decade or so, every time a new nuclear project starts the cost of wind and solar drops substantially before it's complete. This absolutely ruins the nuclear project's original cost/benefit analysis and makes continued spending on it look irresponsible. Wind and solar are outcompeting everything else, which is probably a good thing overall. If energy storage tech becomes more affordable/effective we might not need nuclear at all.

[–] QuandaleDingle 16 points 11 months ago (2 children)

The appeal of solar and wind for me is how they can enable a decentralized grid. Anyone could set up these utilities according to their needs, which builds societal independence. Also means less resources are likely to be needed overall.

[–] [email protected] 14 points 11 months ago (3 children)

If by decentralized you're mainly referring to rooftop solar, it's unfortunately the least cost-effective way to generate electricity. The $/MWh for rooftop solar is even higher than nuclear on average. Wind and solar are more cost-effective in grid-scale installations. A decentralized/individualized grid would actually require more resources.

[–] [email protected] 7 points 11 months ago

Right but if you're off grid, it's kind of irrelevant what in-grid costs, it's just nice that it's an option at all and that it keeps getting cheaper.

[–] QuandaleDingle 1 points 11 months ago

Yeah, grid-scale is exactly what I had in mind. I admit, I'm not knowledgeable in utility engineering. Looks like some research is in order. :)

[–] [email protected] 0 points 11 months ago

Roof top solar is also a terrible idea due to the huge safety issue it raises for utility workers trying to maintain or repair damaged lines. How do you quickly and safely isolate dozens if not hundreds of houses feeding into the same line if they are all feeding power into the grid? It sounds like a corp shill line but if you're going rooftop solar you should go fully off grid due to the potential danger your panels can cause in any down line situation.

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