this post was submitted on 13 Jun 2023
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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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A Greenwashing Lawsuit Against Delta Aims to Set Precedent | A class-action lawsuit targets the airline’s claim to carbon-neutrality, which has in the past rested in part on its use of carbon offsets (www.bloomberg.com)
submitted 1 year ago by silence7 to c/climate
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[–] silence7 1 points 1 year ago

It's a bit hard to restrict advertising like that in the US. In most case, about all you can do is to ask that they not make fraudulent claims, which is what Delta was doing.

The "sustainable aviation fuels" are things we know how to make, but they're either very limited in supply (biofuels, where we're burning a large chunk of the maize and soy crops already) or incredibly expensive (synthetic fuels from captured carbon marketed as 'e-fuels') The corporate research around these isn't really designed to turn them into something which will get used at scale, but seems more like the PR exercises we've seen the fossil fuels industry repeatedly conduct in the past.

The batteries are coming, at least for short-haul flights. The factory to make the first ones with a high enough energy density to support commercial flights is being built as we type.