this post was submitted on 25 Oct 2024
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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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Key to H2 economy: Toyota portable H2 cartridge (www.hydrogenfuelnews.com)
submitted 2 weeks ago by humanspiral@lemmy.ca to c/climate@slrpnk.net
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cross-posted from: https://lemmy.ca/post/31642688

for capacity: https://insideevs.com/news/738124/toyota-portable-hydrogen-cartridge-fcev/#:~:text=Gallery%3A%20Toyota%20Portable%20Hydrogen%20Cartridges&text=Toyota%20didn't%20say%20how,of%20161%20grams%20of%20hydrogen.

161grams = 5kwh+ of heat energy or close to 3kwh of electric only energy in a fuel cell.

For drones, ebikes, powerstations, this would be higher electric weight density than batteries. And solves ebike/powerstation charging on the go problem.

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[–] ptz@dubvee.org 2 points 2 weeks ago (2 children)

Also, wouldn't you need an entire hybrid drivetrain in your ebike to make this work?

I'm assuming the ebikes they mean would use a fuel cell instead of (or augmenting) a battery. Just a guess, though.

[–] federalreverse@feddit.org 4 points 2 weeks ago

Fuel cells produce electricity, not motion. The electricity is then usually buffered in a small battery, so the fuel cell can produce at optimum efficiency even though the requirements may change quickly. At least that's how the Mirai and other modern H2 vehicles work.

Alternatively, you can simply burn H2 in a motor but that's supposed to be a lot less efficient.

[–] Addv4@lemmy.world 2 points 2 weeks ago

A kinda doubt it. A PEM fuel cell usually has a small amount of very expensive elements (like platinum) so I doubt they would be particularly feasible for something like an ebike.