Dig it.
Q: What makes a greenhouse gas different from a non-greenhouse gas?
A: A greenhouse gas is transparenent to shortwave radiation from the sun and opaque to longwave radiation from the earth.
Q: Is water a greenhouse agent?
A: Yes. Water is transparent to shortwave radiation from the sun and opaque to longwave radiation from the earth.
The biggest secret in this whole greenhouse hoax is that the global ocean is what creates the greenhouse effect. The atmosphere’s largest role is in establishing a surface pressure of 14.7psi which allows water to remain it it’s liquid phase through a 100 Kelvin temperature range and little else.