this post was submitted on 31 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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Researchers quietly planned a test to dim sunlight. They wanted to ‘avoid scaring’ the public. (www.politico.com)
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[–] veganpizza69@lemmy.vg 1 points 12 hours ago* (last edited 12 hours ago)

The EU Scream podcast recently had a nice episode on this topic: EU Scream - Ep.118: Putting Guardrails on Playing God

The recent European heatwave killed some 2,300 people with more than half of deaths attributable to human-caused climate change. But what if temperatures can be lowered using technology? It's a highly charged question. One of the ideas out there is to create a parasol of particles around the earth to reflect sunlight back into space.

Cooling the planet this way is known as solar geoengineering. Many Europeans reject geoengineering outright. They say nobody should be playing God with the climate. Yet exploration of geoengineering, backed by private investors, looks to be zooming ahead. Unregulated. But in anticipation of strong future demand in a world where temperature rises are on course to reach nearly 3 degrees this century. That's way above the 1.5 degree target concluded a decade ago under the Paris climate agreement.

In this episode: a conversation with Cynthia Scharf. Cynthia participated in the Paris climate negotiations as an aide to former UN Secretary-General Ban Ki-moon, and she's now with the Brussels-based think-tank, the Center for Future Generations. She is not giving up on the Paris deal from a decade ago. Far from it.

Efforts to drastically cut emissions are essential. But Cynthia also says the time has come to consider the implications of what she calls technologies of desperation like dimming the sun with solar geoengineering.​ And time for the Europe to take a leadership role to determine if the technology can ever be safe and viable — or if it's just too dangerous even to try.

China’s preference for state secrecy makes it unsuitable for such a role, while the US, under Trump, has walked out on climate action and collective security. That leaves the Europe Union well placed to pick up the mantle of responsibility and to try to put up international guardrails against careless or malign use of geoengineering.

Opening up discussion of geoengineering could also help to quell conspiracy theories linked to the technology, like the idea that contrails from aircraft are chemtrails for mind control. Less clearcut is how the EU can promote international governance of solar geoengineering in an era when multilateralism has hit the rocks and anti-science forces are on the rise.