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A comment on Ask HN: Is hydrogen likely to be a major source of power in the next 10 years?. Parent comment

Re:Ask HN: Is hydrogen likely to be a major source of power ... by ben509 on Wednesday September 23, 2020 @05:42PM (#24572426)
I think it'd be an "indirect" GG because it's electricity intensive to obtain it, and that likely comes from a carbon emitting source. The same argument is often made about electric vehicles.
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Re:Ask HN: Is hydrogen likely to be a major source of power ... by IanCal on Wednesday September 23, 2020 @06:40PM (#24573036)
In this case it's about how it interacts with OH radicals in the atmosphere, meaning other GHG stay in the atmosphere longer. So it's not a greenhouse gas, but it makes others hang around longer.

> The reaction of hydrogen with OH radicals has a further side-effect of reducing the availability of OH radicals with potential impacts on the build-up of greenhouse gases.

https://assets.publishing.service.gov.uk/government/uploads/...

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Re:Ask HN: Is hydrogen likely to be a major source of power ... by godelski on Thursday September 24, 2020 @02:18AM (#24575810)
Well you don't typically get hydrogen from H2O, you get it from CH4. So your byproduct isn't oxygen, it is carbon. Unlike electric vehicles, it doesn't get greener as the grid changes to wind/solar/nuclear/hydro. There's just more hydrogens per hydrocarbon than water. Not to mention dealing with oxidation.
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