this post was submitted on 15 Nov 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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[–] Atom@lemmy.world 6 points 1 month ago* (last edited 1 month ago) (1 children)

Kyle Hill has done a fantastic job discussing nuclear energy, if anyone is interested in learning more about its viability. https://youtu.be/J3znG6_vla0

Also, I'll leave this safety study here as well because nuclear safety is, and should be, a top concern.

https://ourworldindata.org/safest-sources-of-energy

[–] silence7@slrpnk.net 9 points 1 month ago* (last edited 1 month ago) (1 children)

Right, but nuclear remains far more expensive than wind and solar, which is why almost no new nuclear gets built.

I'll also note that a chunk of the data is from 2007 and 2008, and the price (and greenhouse gas emissions associated with) both wind and solar have declined markedly since then.

[–] Atom@lemmy.world 2 points 1 month ago* (last edited 1 month ago) (1 children)

Great points! Wind and solar are far easier to scale. Their main issue is land use, but when applied properly (with appropriate environmental impact assessments) that's not a major concern on its own, really it's transiting that power to use centers. Dealing with the individual property rights for a transmission line that doesn't benefit the person under it is and has been enough to kill energy projects.

In my opinion, nuclear's strength lies in its energy density. You could replace a coal or gas plant with a nuclear plant. This is an option being explored by a couple companies because it enabled them to use land no one wants that already has the cooling and transmission connections.

I support nuclear and it was a recurring theme in my environmental policy degree, but I am by no means against wind and solar. I think they are fantastic sources. They each have their trade offs. But we will need to make use of everything in the face of climate change.

One small note, nuclear is expensive, however be cautious when researching cost per Wh produced and look for the time scale. Wind and solar projects are often forecasted to run for just 20 years, they can certainly go longer though. Nuclear runs for 50+ years. Cost comparisons always use the lowest time scale. Nuclear obviously has a very high upfront cost that makes it stupid expensive for a 20 year plan, but over 50 it can reach parody or undercut renewables. Renewables are also done a disservice by these same reports by locking them to the low timescales when their leases are easily extended. But leases are also a large expense so renewal does bump the cost. Things get difficult to forecast with those known-unknows, so it's easier, and more accurate to take the lowest scale and say "this is the cost for 20 years" and let the reader decide if they want to math out the 2.5 multiplier. But then it wouldn't be accurate to the 20 years since renewal costs and...well, you see why we use the lower scale.

[–] silence7@slrpnk.net 3 points 1 month ago (1 children)

Yeah, wind and solar seem to be able to go for 50+ years too. The main reason they're not doing that so far is that newer installations can kick out more electricity (and money) in the same footprint.

[–] Atom@lemmy.world 3 points 1 month ago* (last edited 1 month ago)

And they'll only get better with time. I think It'll be a little rocky the next four years in the US. But still, they are great. My house is 100% wind powered and I regret not putting solar on 5 years ago