this post was submitted on 02 Jul 2025
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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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[โ€“] HaraldvonBlauzahn@feddit.org 3 points 12 hours ago (1 children)

The 2003 European heatwave has been estimated to have killed more than 70,000 people.

A lot of heat deaths are not obvious, people might die days later because of circulatory problems or many other symptoms (I remember that heat can cause kidney failure, for example).

These deaths can only later be identified as excess deaths from mortality statistics. Germany had a "small" heat wave in summer 2020, and it killed more people than Corona in this summer (not to be confounded with the following years).

[โ€“] HaraldvonBlauzahn@feddit.org 1 points 12 hours ago

BTW it is a question of time not if, but when the electric grid in an Eastern European or Mediterranean country fails and this can cause far more deaths - I speak of hundreds of thousands - if it hits people depending on air conditioning. A big power failure in Italy or Greece and people would be fried alive.

This is also why we need solar power, it is far better matched to that peak demand. (Plus it kills fossil electricity by undercutting it in cost, which is a nice-to-have since we are at war with fossil power now - either we kill it, or it will kill us).