this post was submitted on 11 Jul 2025
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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.

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Britain and Europe need to get serious about air conditioning | In a rapidly warming world, a former extravagance is becoming a necessity (www.ft.com)
submitted 2 days ago* (last edited 2 days ago) by silence7@slrpnk.net to c/climate@slrpnk.net
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This graph is why:

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[–] Palerider@feddit.uk 8 points 2 days ago (1 children)

Most buildings in Europe are already well insulated but during hot spells it doesn't keep heat out...

[–] irishPotato@sh.itjust.works 5 points 2 days ago (1 children)

Not sure that’s how good insulation works, if it’s not keeping heat out, then it’s not that good of an insulation.

But I think I get your point, it’s good enough so that winter time heating doesn’t escape faster than it is produced, problem then being that nothing offers cooling in the summer months. Still ameliorated by better insulation.

Besides my experience of Central Europe is that insolvency ain’t all that good..

[–] WhatAmLemmy@lemmy.world 13 points 2 days ago* (last edited 2 days ago) (1 children)

Insulation doesn't mean anything beyond 48-72 hours of persistent temps. Human dwellings are not designed to be airtight, because we would suffocate.

Europe is already insulated to maintain internal temps double-digits above external temps during winter. The problem is they only have heaters; not coolers.

[–] The_v@lemmy.world 4 points 2 days ago

Insulation only works if night-time air temps are significantly different than daytime temps - like in arid desert regions. Whole house fans are extremely effective under these conditions.

Say the night time temp is 16C and the daytime temp is 36C. Opening the windows at night and turning the fan on will cool the house down to 18-20C. Then closing everything up in the morning (windows and blinds) the house will only warm up to around 25-27C during the day. Hot but not deadly.

When the temps peak over 40C and the nighttime temps are 30C, people die without some type of active cooling. Especially if the humidity is high as well. Even a window unit that pulls the temp down to 25C at night can save lives.