Curiously, Jim Puplava (a voice I greatly respect) doesn't put much stock in global warming, in fact he's had several credible guests on his show who point to global cooling as the central issue, and not something we can change either, since it's being driven by the sun's effect on ocean temperatures - essentially the underlying cause of ice ages.

for jim puplava global warming is an economic issue, not a scientific issue. additional government regulation costs money, and reducing carbon emissions will make energy more expensive, so he's against it. if global warming were somehow profitable, puplava would be a champion of it.