In Saab's application to the Court of Appeal for Western Sweden Saab reveals that the company has a pending patent on a new extended range electric vehicle concept that will reduce the CO2 emissions considerably. With this technology the Saab 9-3 would emit less than 50 g CO2 / km.
It's a full hybrid concept with different drive modes, e.g. pure electric propulsion, propulsion purely by the internal combustion engine, or a combination of the two.