How to improve air quality in Beijing

Vehicles are typically by far the largest source of human exposure to air pollution in densely packed urban areas. Plus, the contribution of vehicle emissions to air pollution in China is increasing as the population of motor vehicles in Beijing and around China continues to grow rapidly. Implementing stringent controls to mitigate the pollution impacts of China's motor vehicles must be a key priority in parallel with controlling other sources such as factories and power plants, writes Vance Wagner. Read more