The old climate change, page-45

Water constitutes way over 90% of greenhouse gases. Water is also way better at being a greenhouse gas due to single-bonded hydrogens. CO2's double-bonded oxygen molecules are rigidly attached to the carbon atom rendering it a very poor molecule to absorb energy. One day I'll write something on HC explaining it it more detail because the climate change people seem to be suffering from a dearth of knowledge re anything to do with how CO2 works when the sun shines on it...