1. Comparative Environmental Life Cycle Assessment of Conventional and Electric Vehicles;Hawkins;Journal of Industrial Ecology,2012
2. The air we breathe is laced with cancer causing substances;Tracy Staedter;Reuters,2013
3. Air pollution linked to 1.2 million premature deaths in China;Edward Wong;The New York Times,2012
4. Policy is the muscle behind natural gas vehicles in China;Saqib Rahim;E&E News EnergyWire,2013