Supreme Court CO2 ruling clears path to hybrid future?

According to the AP the Supreme Court decided 5-4 that the Federal Government should take a fresh look at regulating the CO2 emissions from automobiles, a development which could have a huge impact on hybrid vehicles.

Such a move has been tenaciously fought against by most major automakers, especially those in Detroit. Ultimately, the best way to reduce CO2 emissions is to increase fuel economy and to use hybrid technology. Hybrid cars, such as the Toyota Prius, not only cause a significant increase in fuel economy, they also cause a significant decrease in CO2 emissions by being able to use pure electric power instead of gasoline in stop-and-go driving conditions for example - the conditions that cause the greatest CO2 emissions and contribute to global warming.