驾车是普通市民所做出的最污染环境的一种行为。尽管努力提高发动机耗油的效用,尽管越来越多的防污染设备相继问世,但是载人交通工具所排出的废气仍在与日俱增。所有的内燃机所排放的废气合在一起,使驾驶员 Driving is the most polluted environment that ordinary citizens make. Despite efforts to increase the effectiveness of engine fuel consumption, despite the ever-increasing number of anti-pollution devices, exhaust emissions from passenger vehicles continue to increase. All the exhaust gases emitted by the internal combustion engine are combined to make the driver