Christian Science Monitor: The political tussle over whether carbon dioxide is a pollutant subject to government regulation has gone on for years. Early in his first term as vice president, Al Gore pushed a tax on CO2. Democrats and Republicans in Congress were both skeptical. The idea went nowhere. As a presidential candidate, George Bush seemed to think regulating CO2 was a good idea. At least he said so. After his election, then-Environmental Protection Agency (EPA) administrator Christie …