this post was submitted on 26 Jun 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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[–] fireweed@lemmy.world 17 points 6 months ago (1 children)

Every climate scientist crunching the numbers right now is freaking out behind semi-closed doors because they're worried that if the media starts running with the story that "thanks to a series of feedback loops the climate may already be fucked beyond hope of ever returning to normal, and at this point the best we can do is try to minimize the damage but even that will require completely upending the status quo," everyone will give up on climate/environmental action entirely, so the public instead is fed an alternating diet of toned-down warnings and positive news about microscopic improvements to maintain a general sense of hope.

If that's "moving in the right direction," we deserve our demise.

[–] silence7 8 points 6 months ago (1 children)

The point where things stop getting worse is the point where we've fully succeeded in getting off fossil fuels, ended deforestation, and phased out use of a few industrial gases and refrigerants. That's something like the end stage of action, not the messy middle where we are now. If we succeed, we'll get there in about 25 years.

[–] magiccupcake@lemmy.world 6 points 6 months ago

Even if we fully stopped emitting net CO2 today, the climate will continue warming in 25 years. All the methane and CO2 we've already emitted will continue to warm the climate.