On 3/8/2021 6:10 PM, Mark Mocho wrote:
On Monday, March 8, 2021 at 1:42:45 PM UTC-7, Eric Greenwell wrote:
Mark Mocho wrote on 3/8/2021 11:34 AM:
And I seem to remember hearing that water vapor is more of a "greenhouse gas" than carbon dioxide.
Not so much when it comes to climate change, because as water vapor increases (primarily due to
global warming), it forms more clouds, which reflect the heat, tending to reduce global warming
- all part of a natural cycle that's be going on since the earth began. CO2 does not condense,
and we are adding it to the atmosphere at a far higher rate than natural carbon sinks can
remove it.
--
However, using hydrogen as an alternative fuel WILL add to the amount of water vapor in the atmosphere. Note the following statement:

"...water vapor is the largest contributor to the Earth’s greenhouse effect...However, water vapor does not control the Earth’s temperature, but is instead controlled by the temperature...If there had been no increase in the amounts of non-condensable greenhouse gases (like carbon dioxide), the amount of water vapor in the atmosphere would not have changed with all other variables remaining the same." (from the American Chemical Society's ACS Climate Science Toolkit)

The key phrase is the last one: "with all other variables remaining the same." Imagine that instead of seeing "normal" contrails behind a high flying airliner, there is a huge plume of water vapor that results from burning hydrogen. That definitely adds to atmospheric water vapor, independent of the natural evaporation/condensation cycle that forms clouds.

Of course, the "Chemtrails" paranoids will get a corresponding boost in popularity.


Naaah, to "make" the hydrogen you'd need to separate it from water.
It's a closed loop. There are many hurdles, but this one is not. Of
course you can separate it from methane (natural gas) instead, but if
you burn the gas directly you get the same water vapor.

I find the subject line of this thread appropriate though, there are too
many "wows" out there but the "vaporware" never materializes.