Millions of motor vehicle engines drop small amounts of oil each day onto roads and parking lots. (pearltrees.com)
As in the case of motor vehicle engines, they transform thermal energy into mechanical force, and our modern lifestyle would be impossible without them. (sciencedaily.com)
The Administrator also finds that the combined emissions of these greenhouse gases from new motor vehicles and new motor vehicle engines contribute to the greenhouse gas air pollution that endangers public health and welfare under CAA [Clean Air Act] section 202 (a). (breitbart.com)