I'm not interested in backyard experiments. If someone can point to a link to an experiment where someone might have spent $100,000 out of the many billions of dollars already spent, demonstrating each greenhouse gas. Is water vapour worse than CO2? Is the average water vapour content a lot more than 420 ppm? If so, why don't we have runaway global warming due to water vapour?
Warning. These sorts of questions usually brings these types of threads to a shuddering halt.