And to add to your comment, spelling it out in case it isn't obvious: you can also decouple pollution from energy production using photovoltaics, wind or hydro - and suddenly most of your power chain is clean (what remains dirty is manufacturing the power generator and power storage).
Re:How much do rockets pollute?
by TheSpiceIsLife on Saturday March 21, 2020 @09:14PM
(#22651771)
> The process of producing or using hydrogen does not pollute.
There’s no way this can be correct.
You can’t use hydrogen to produce the electricity used in hydrogen electrolysis, because that’s not permitted in this universe.[1]
Therefore the electricity has to come from some other source, which all generate life-cycle carbon emissions.[2]
1. https://en.wikipedia.org/wiki/Second_law_of_thermodynamics
2. https://en.wikipedia.org/wiki/Life-cycle_greenhouse-gas_emis...
Hydrocarbons pollute by their very nature. In order to have a carbon neutral hydrocarbon cycle you need an impractical number of CO2 capture facilities.