A power plant that don't have a scrubber is likely still less polluting that 10000 power plants that have to weigh 150kg and that have an equally low likelihood of having any environmentally friendly implements.
Actually, auto exhausts in first tier cities that implement stricter emissions standards and disallow selling low quality gasoline are not that bad. The problem are the blue trucks that come in from the provinces at night that don't have good emissions equipment and are running on crappy gas. You could actually see the air quality get WORSE in Beijing after 11 pm, when few personal cars are on the road but the Hebei trucks start coming in.
