Study Shows Plug-in Hybrids Dirtier than Believed
Plug-in hybrids pollute up to three times more than advertised, even when fully charged, and emit five to seven times as much CO2 when the engine is running, according to a new study commissioned by Belgian NGO Transport & Environment (T&E) and conducted by the University of Technology in Graz, Austria
The study measured emissions from three popular models: the BMW 3 series, Peugeot 308, and Renault Megane. Like many plug-in hybrids, these cars started as gas/diesel-powered models and then a battery was added on to improve emissions testing performance and mileage