this post was submitted on 29 Aug 2023
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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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[–] forksandspoons 4 points 1 year ago

Afaikt the paper refernced in the article is The Human Cost of Anthropogenic Global Warming: Semi-Quantitative Prediction and the 1,000-Tonne Rule. .

From the abstract:

The carbon budget for 2°C AGW (roughly 10^12 tonnes carbon) will indirectly cause roughly 10^9 future premature deaths (10% of projected maximum global population), spread over one to two centuries.

The key part of this being that it specifies 2C of warming. According to the climate action tracker, with current policies are on track for 2.7 degrees of warming by 2100. So assuming no further polices to move back to 2C or less, the 1 billion deaths could be larger.