[reg45]

Water, H₂O, another "greenhouse gas" is also essential for life.

[Graewoulf]

H2O = 25,000 parts per million (2.5 % of atmosphere), and CO2 = < 400 parts per million (< 0.04% of atmosphere).

BTW, isn’t a “Greenhouse” good for growing green plants?

Sooooooooooooooooooo, what is the problem? Surely the “Greenies” are not against green plants?