Jeremy Clarkson says that the Porsche 911 Turbo is cleaning the air. It’s a great car, but definitely no Dyson.
When you drive this car through a really polluted city; Los Angeles, Calcutta, Harrogate(?), something like that; the gas coming out of the exhaust pipe is less toxic than the air going into the engine. And I am not joking, that’s true. This then is like a small, efficient, easy to use spotless vacuum cleaner. They should have called it the Porsche Dyson.
Source: Autoblog Green