this post was submitted on 25 Jun 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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[–] [email protected] 20 points 6 days ago (11 children)

Bought our first electric car this year and will never go back to Diesel. If heat pumps weren’t so expensive I’d have one installed tomorrow.

[–] [email protected] 10 points 6 days ago (10 children)

Curious what the cheaper alternative is - what country are you from? Where I am we don't call them 'heat pumps', they are just reverse cycle air conditioners and it's the standard.

[–] [email protected] 13 points 6 days ago (8 children)

I’m in the UK, short-term cheaper alternative is keeping your existing gas boiler until it breaks down… so roughly 20-30 years. The government gives £7,500 towards a heat pump but that has resulted in prices staying artificially high and virtually every install for a 3-4 bed home comes in at £10,000. A new gas boiler is around £1,500-£2,000. Due to some other short sightedness, any heat pump which also cools is not eligible for the £7,500 grant, which is really problematic when temperatures keep rising.

[–] [email protected] 9 points 6 days ago

I am genuinely waiting for the grants to finish (or be updated), as it feels like all the installation companies just hiked their prices to take advantage of the grants. I've got the power run, massive radiators, and thick pipes, all ready to roll.

The big one that will really push HPs, imo, will be if gas starts to rise in price relative to electricity.
At the moment, it's about level in cost to run, even though a HP is 3x+ more efficient.

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