this post was submitted on 25 Oct 2024
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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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Key to H2 economy: Toyota portable H2 cartridge (www.hydrogenfuelnews.com)
submitted 2 months ago by humanspiral@lemmy.ca to c/climate
11 comments fedilink hide all child comments
 

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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[–] federalreverse@feddit.org 4 points 2 months 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.