this post was submitted on 17 May 2024
42 points (62.7% liked)

Climate - truthful information about climate, related activism and politics.

5321 readers
373 users here now

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:

Anti-science, inactivism, and unsupported conspiracy theories are not ok here.

founded 1 year ago
MODERATORS
[email protected]
42
Five Things the “Nuclear Bros” Don’t Want You to Know About Small Modular Reactors (blog.ucsusa.org)
submitted 6 months ago* (last edited 6 months ago) by [email protected] to c/[email protected]
46 comments fedilink hide all child comments
 

A realistic understanding of their costs and risks is critical.

What are SMRs?

  1. SMRs are not more economical than large reactors.

  2. SMRs are not generally safer or more secure than large light-water reactors.

  3. SMRs will not reduce the problem of what to do with radioactive waste.

  4. SMRs cannot be counted on to provide reliable and resilient off-the-grid power for facilities, such as data centers, bitcoin mining, hydrogen or petrochemical production.

  5. SMRs do not use fuel more efficiently than large reactors.

[Edit: If people have links that contradict any the above, could you please share in the comment section?]

you are viewing a single comment's thread
view the rest of the comments
[–] [email protected] 3 points 6 months ago* (last edited 6 months ago) (1 children)

My personal stance is that sustainability cannot be achieved within capitalism due to its model of eternal growth. We can have one or the other, but not both.

So creating more energy could not be the solution. Creating less demand would be, and the demand comes from industries.

More often than not, I it seems to me this discussion about clean energy is a deflection of the real problem which is industrialisation under capitalism. We don't question anymore what this energy is needed for.

[–] [email protected] 7 points 6 months ago (1 children)

Good news then, Microsoft is building a new multibillion dollar AI facility which will ratchet up power demands alongside the increase in power demands for crypto. Oh wait, I said good news. Uhh....

[–] [email protected] 1 points 6 months ago (1 children)

We have excellent incentive to start a Dyson sphere?

[–] [email protected] 2 points 6 months ago

No sun to warm us, No global warming.

But in all seriousness some of the breakthroughs in fusion reactors have me excited long term. It's nowhere near ready yet, but we've hit net energy gain, just can't sustain it well.