This Lorne Gunter article on climate change at Tech Central Station discusses research that suggests the opposite of what lots of people have been thinking: it suggests that carbon dioxide is a consequence of global warming,not a cause. It’s a very interesting, at a least to a certain extent testable, hypothesis. It is also consistent wtih research by Sallie Baliunas and Willie Soon and others that indicates the role that sunspot activity has had in warming the earth’s surface and atmosphere over the past millenium.
Gunter’s conclusion is a bit depressing, but realistic; he thinks that even if this hypothesis is not falsified by other research, the wide web of subsidies and special interests involving the alternate CO2=>climate change hypothesis will keep it from spreading in acceptance.