Is there more money in warning about global warming, or in being a skeptic about it? This is an easy one--there is far more money in being a "warmist."
I think this helps explain why it seems on first and even second glance that the warmists are real experts with Ph.Ds, whereas the skeptics are amateurs. The real experts know which side their bread is buttered on--and they often give support to "green" projects that are environmentally dubious, and profitable mainly because of government subsidies.
h/t Bishop Hill.