this post was submitted on 09 Aug 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.

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Sustainable Aviation Fuels Are Struggling to Take Off Amid Greenwashing Claims (insideclimatenews.org)
submitted 3 months ago by [email protected] to c/[email protected]
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[โ€“] UnderpantsWeevil -2 points 3 months ago* (last edited 3 months ago) (1 children)

https://en.wikipedia.org/wiki/Comac_C919

Currently in production and use by China Eastern Airlines, although the production run is very limited (13 built, 7 in active use). It's high efficiency passenger plane with a range of 3500 miles, capable of holding 156-168 people based on seat configuration.

This vehicle threatens to compete with the Airbus 320 and Boeing 737 Max jets.

It should be noted that the engines for these planes (https://en.wikipedia.org/wiki/CFM_International_LEAP) was originally developed as a joint project by the American engineering company GE and the French Safran Aircraft Engines. Chinese firms bought the design specs, insourced the production, and are now rolling them out for productive use while their French counterparts are still stuck on old designs and the Americans are just shoving their planes nose-first into the tarmac.

[โ€“] [email protected] 2 points 3 months ago

About 4L/100km/passenger, no better than a big SUV with four passengers but the SUV actually has anti emissions tech and doesn't release it's emissions at altitude.