this post was submitted on 16 Sep 2024
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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] 1 points 2 days ago* (last edited 2 days ago)

are likely about 662% – or 7.62 times – higher than officially reported.

This annoys me. If the value is 662% higher than reported, then it is also:

  • 6.62 times higher than reported
  • 762% as high as reported
  • 7.62 times as high as reported

Whether you use percentage or a factor doesn't change the principle. "as high" signals a new value that is a straight multiple, "higher than" signals a change that is a multiple, so always assume a base of 1 or 100% on which the change is added.

By the way 1 and 100% is the exact same thing, and so is 662% and 6.62. Percent aren't magical they are just a short form for saying hundredths of 1.

In everyday speech they also signal that you're talking about a fractional value in relation to a different one that is hopefully clear from context. But it isn't always and people abuse that too.