this post was submitted on 30 Nov 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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Airlines Race Toward a Future of Powering Their Jets With Corn | Carriers want to replace jet fuel with ethanol to fight global warming. That would require lots of corn, and lots of water. (www.nytimes.com)
submitted 1 year ago by [email protected] to c/[email protected]
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[–] Mojojojo1993 3 points 1 year ago (1 children)

Why not just go hydrogen at that point? Isn't it easier ?

[–] [email protected] 6 points 1 year ago (1 children)

Several reasons:

  • it's cheaper to do a PR exercise than to actually change (Hydrogen requires all new aircraft)
  • The lithium-air batteries coming to market in the next couple years are likely to make short-hop commercial electric air travel viable
  • air travel isn't the worst use of limited biofuels
  • it lets them use existing aircraft instead of new ones
[–] Mojojojo1993 1 points 1 year ago (3 children)

Are you made. Lithium air. The holy Grail of battery tech. I want want your huffing. Think you are dreaming of you think we will get air travel with electricity in the next decade. Let alone few years.

It is no I agree but also why not skip middle man and go hydrogen. Cuts out a lot of issues with biofuel. Adds a bunch with hydrogen production, storage transportation, safety.

Also true.

I was under the impression they were retrofitting them to take hydrogen. I know a family member on the areospace field and they are currently testing hydrogen as a new system. Obviously electric would be better but it's decades away.

[–] Mojojojo1993 2 points 1 year ago

Yeah bad thought process. I wouldn't say as bad as Trump though. I've not been racist sexist or claiming wind mills cause cancer. I get a few positive nys for that.

[–] [email protected] 1 points 1 year ago (1 children)

Viable aircraft batteries are close. Probably not the 'this year' that's in the announcement, but next in 2024.

[–] Mojojojo1993 1 points 1 year ago

Short haul flights. Yes. Because I know they have them. Currently testing. But nothing substantial. Battery isn't ready just yet. Won't be ready for several years. Then plants need to test for 10+ years for safety. Then production and getting them to customers. It's a long way away.

Small planes that can fly for a few hours then recharge are viable.