this post was submitted on 29 Aug 2023
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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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Climate-changing human activity could lead to 1 billion deaths over the next century, according to new study (phys.org)
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[–] demonquark@lemmy.world 4 points 1 year ago (1 children)

What are the most likely causes of death? Are we talking average life expectancy drops by a couple of years, but quality of life remains constant? Or are we talking famine and war due to a loss of areable land?

I assume it’s a little of both, but it’s useful to know which sides the scales tip.

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

It's an estimate of premature deaths based on CO2 emissions.

"Pearce and Parncutt found the peer-reviewed literature on the human mortality costs of carbon emissions converged on the "1,000-ton rule," which is an estimate that one future premature death is caused every time approximately 1,000 tons of fossil carbon are burned.

"Energy numbers like megawatts mean something to energy engineers like me, but not to most people. Similarly, when climate scientists talk about parts per million of carbon dioxide, that doesn't mean anything to most people. A few degrees of average temperature rise are not intuitive either. Body count, however, is something we all understand," said Pearce, a Western Engineering and Ivey Business School professor.

"If you take the scientific consensus of the 1,000-ton rule seriously, and run the numbers, anthropogenic global warming equates to a billion premature dead bodies over the next century. Obviously, we have to act. And we have to act fast.""