
The Toyota Prius is among the greenest cars to operate. But manufacturing the famous gasoline-electric hybrid can be a dirty business.
Toyota studied the car's total environmental impact from factory to junkyard.
Not surprisingly, the fuel-efficient Prius was better than average in its class of vehicles in lifetime emissions of carbon dioxide, nitrogen oxide and sulfur oxide, according to Toyota.
But it was slightly worse than average in emissions of nonmethane hydrocarbons and particulate...