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Key to H2 economy: Toyota portable H2 cartridge
(www.hydrogenfuelnews.com)
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:
How much each change to the atmosphere has warmed the world:
Recommended actions to cut greenhouse gas emissions in the near future:
Anti-science, inactivism, and unsupported conspiracy theories are not ok here.
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.