[Flyndaran]

Originally Posted by malloyd

It takes a lot of energy to crack lift hydrogen from anything, it's going to leak badly, and sunlight isn't a very intense source. I don't think there is going to be enough red and blue photons in any given column of air to sustain enough of this stuff to get deep sea floor level darkness, certainly not thickly enough there won't be plenty of weather caused holes in the cover. Forest shade under a green sky perhaps. This is still bad news for the current ecosystem of course, particularly since the removed photons are also the ones the land based plants wanted, but probably well short of sea bed levels.

"Twilight of man", not "I can't see ****... of man", eh?