David Attenborough blasts Australia, page-104

well England is generally colder then here, you can get plenty of clouds in tropical areas, but still keep a 30deg average.

Anyway it is a fact that water vapor/cloud is the most prevalent green house gas but will never cause a run away green house effect, it is reflective and can condense back to liquid at our average temps.

CO2 is invisable and needs about -80 deg c to liquify at sea leave pressures.