this post was submitted on 25 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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[–] Kalkaline@leminal.space 45 points 1 year ago (2 children)
[–] silence7@slrpnk.net 52 points 1 year ago

1 atmosphere, so sea level pressure, per Diána Ürge-Vorsatz

[–] MxM111@kbin.social 3 points 1 year ago
[–] Dashmezzo@lemm.ee 18 points 1 year ago

If it weighs that much why did they have to strap it down. Huh….. Huh /s

[–] M500@lemmy.ml 11 points 1 year ago (2 children)

Wait?! Is this what they mean by carbon capture?

[–] nul@programming.dev 10 points 1 year ago

Next step is interrogation

[–] Ephera@lemmy.ml 3 points 1 year ago

Well, not in such cubes, but I have heard the plan of piping the CO2 into underground caverns.

[–] AI_toothbrush@lemmy.zip 11 points 1 year ago

Expected it to be bigger, still terrifying

[–] yojimbo@sopuli.xyz 10 points 1 year ago* (last edited 1 year ago) (1 children)

Not sure it actually demonstrates the extend of the issue. My favourite way to look at it (via ThunderF00t@youtube I believe):

  • dry ice is essentially frozen CO2 ( CO2 in solid form)
  • cca 40 billion tuns per year (cca 5t per person / year, 8 billion people)
  • 1km side cube of dry ice weights cca 1.5 billion tuns (1.560 kg/m3 says wiki)

=> Burj Khalifa has 830 m - imagine huge cube of dry ice 20% taller ( or 3x eifell tower)- all that CO2 boiling off in massive clouds - than add 25 of them - each year. We've been doing this at some scale for decades....

[–] essellburns 3 points 1 year ago (1 children)

Okay?

What's the takeaway from that?

[–] silence7@slrpnk.net 12 points 1 year ago (1 children)

We're dumping tens of billions of tonnes per year in the atmosphere. Enough to make a difference

[–] essellburns 4 points 1 year ago (2 children)

Yes, I'm aware. My question was about the inflatable really?

[–] lefaucet@slrpnk.net 8 points 1 year ago

When I say US citizens put out 13 tonnes per capita of CO2 a lot of folks have no ideawhatt that means. Is that a lot?

The answer is yes. The US is essentially sticking about 5 billion of these into the air every year, and they dont come down...

CO2 looks clear to our eyes but is opaque in infrared, meaning last year humans blanketed the sky with 35 billion of these heat absorbing gas baloons, that will never come down in our lifetime, but willl make our world hotter.

The few hundred billion we've already put up there is already leading to starvation in poor countries and mass bleaching of coral reefs and disruptions inoceans flows our ocean eco system depends on, oceans... You know, a huge source of food.

So were merrilly marching into a never ending dust bowl that according to the fossil record will terminate with an ice age that will last millions of years.

It'll be great explaining to your kids how cars and cruises and sugary bubble soda was worth sending them into never ending wars for food.

[–] nossaquesapao@lemmy.eco.br 7 points 1 year ago (1 children)

Most people have a hard time visualizing how much a tonne of CO2 is, and that weird thing helps people understand how big it is, and can make them more worried about pollution, and more likely to seek change.

[–] essellburns 2 points 1 year ago

Ah yes, raising awareness The 20th centuries answer to climate change.

I am so old and cynical. But then I've seen people raising awareness for 40 years and I'd say the results have been uncertain.

[–] cobra89 1 points 1 year ago* (last edited 1 year ago) (2 children)

I guess I'm confused on the definition of a "tonne" of CO2. Am I to believe that if that cube was completely full of CO2 that volume of CO2 would weigh 1000kg?

Nevermind, just looked it up. It's actually a measure of volume, just 1000 cubic meters, which makes perfect sense.

Edit: it was actually the first one, although a "tonne" as a measure of volume does exist.

[–] doctordevice@lemm.ee 7 points 1 year ago (1 children)

You had it right the first time, 1 tonne (1000 kg) of CO2 at standard temperature and pressure would have a volume equivalent to that cube.

[–] Umbrias 2 points 1 year ago (1 children)

Gas doesn't seem heavy until you handle gas canisters full and empty.

[–] cobra89 1 points 1 year ago (1 children)

I mean, those are much higher than 1 atmosphere though.

[–] Umbrias 3 points 1 year ago

Sure. Don't often store more than 7,000 L STP and that's a 2m cube.