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I was hoping to see in the article -- but didn't -- an analysis of the CO2e per KJ produced from natural hydrogen. Water vapor is a greenhouse gas and it'd be i

I was hoping to see in the article -- but didn't -- an analysis of the CO2e per KJ produced from natural hydrogen. Water vapor is a greenhouse gas and it'd be important to do the math to see how much better it is vs. other alternative fuels. (I expect it to be better, but how much is the question.)

jojobas 4y ago
You don't have to release it as vapor. Otherwise energy is energy and depositing it into the atmosphere raises the equilibrium liquid/vapor point.
sp332 4y ago
Putting water into the air at low altitudes doesn't do much for global warming. The best way to reduce the effects of water vapor at high altitudes is... to reduce warming. https://en.wikipedia.org/wiki/Greenhouse_gas#Role_of_water_vapor https://en.wikipedia.org/wiki/Greenhouse_gas#Role_of_water_v...
DennisP 4y ago
Water vapor is a greenhouse gas but it's not a driver of global warming, because of rain. Total water vapor is a function of global temperature, not the other way around. Put extra water vapor in the air, and it will just rain out.
credit_guy 4y ago
> Water vapor is a greenhouse gas No. Or rather, yes, water vapor is a greenhouse gas, but it has a halflife measured in days, compared to CO2, which has a halflife measured in decades. So, for all practical purposes, water vapor can be deglected when talking about global warming.
- b112 4y ago
  water vapor can be deglected Whyes, mossuredly!
  - credit_guy 4y ago
    Ok. Can you provide some links where any climate scientist includes the water vapor emissions in their calculations? (by the way contrails are not water vapor emissions)
    - b112 4y ago
      No. My whole purpose was to make fun of made up, conjoined words. :P
pwg 4y ago
> Water vapor is a greenhouse gas and it'd be important to do the math to see how much better it is vs. other alternative fuels. With about 71% of the earth's surface covered by water, which constantly emits water vapor due to evaporation, the amount of water vapor added by also burning green hydrogen would likely be minuscule compared to the amount from natural surface evaporation. The huge advantage would be no carbon dioxide emissions from burning green hydrogen.
- deleted 4y ago
  [deleted]
Schroedingersat 4y ago
Water vapor from combustion is dwarfed by vapor from steam generation. If this is your concern your priority should be shutting down every thermal plant immediately.

jojobas 4y ago

You don't have to release it as vapor. Otherwise energy is energy and depositing it into the atmosphere raises the equilibrium liquid/vapor point.

sp332 4y ago

Putting water into the air at low altitudes doesn't do much for global warming. The best way to reduce the effects of water vapor at high altitudes is... to reduce warming. https://en.wikipedia.org/wiki/Greenhouse_gas#Role_of_water_vapor https://en.wikipedia.org/wiki/Greenhouse_gas#Role_of_water_v...

DennisP 4y ago

Water vapor is a greenhouse gas but it's not a driver of global warming, because of rain. Total water vapor is a function of global temperature, not the other way around. Put extra water vapor in the air, and it will just rain out.

credit_guy 4y ago

> Water vapor is a greenhouse gas No. Or rather, yes, water vapor is a greenhouse gas, but it has a halflife measured in days, compared to CO2, which has a halflife measured in decades. So, for all practical purposes, water vapor can be deglected when talking about global warming.

b112 4y ago
water vapor can be deglected Whyes, mossuredly!
- credit_guy 4y ago
  Ok. Can you provide some links where any climate scientist includes the water vapor emissions in their calculations? (by the way contrails are not water vapor emissions)
  - b112 4y ago
    No. My whole purpose was to make fun of made up, conjoined words. :P

pwg 4y ago

> Water vapor is a greenhouse gas and it'd be important to do the math to see how much better it is vs. other alternative fuels. With about 71% of the earth's surface covered by water, which constantly emits water vapor due to evaporation, the amount of water vapor added by also burning green hydrogen would likely be minuscule compared to the amount from natural surface evaporation. The huge advantage would be no carbon dioxide emissions from burning green hydrogen.

deleted 4y ago
[deleted]

Schroedingersat 4y ago

Water vapor from combustion is dwarfed by vapor from steam generation. If this is your concern your priority should be shutting down every thermal plant immediately.