Emissions from today’s modern petrol engines are in many cases cleaner than the surrounding air, particularly in polluted city centres. In the Versatility Concept Car (VCC), Volvo Car Corporation presents entirely new technology that exploits this fact by filtering the surrounding air from the presence of two environmentally hazardous substances: hydrocarbons (HC) and nitrogen oxides (NoX). The technology is called VAAC, Volvo Ambient Air Cleaner.

Read the rest of the article here:

http://car.kak.net/modules.php?op=modload&name=news&file=article&sid=788

Well, thats sort of cool. They should give people tax breaks for getting these or something in polluted areas...