Is water vapour really a greenhouse gas?

A post at http://chiefio.wordpress.com January 15th 'Outgoing vs Land vs Water Vapour' makes you wonder if it is all a hall of mirrors and the greenhouse effect is science that has underrated the role of the Solar Wind and how it interacts with the atmosphere of the Earth. The post by EM Smith is an attempt to understand how water vapour, and other greenhouse gases, might cause warming. What he found was actual surface temperatures are in rough equilibrium with actual solar input – something denied categorically by the Team of climate scientists at the core of CAGW.