One key reason why air pollution kills 400,000 citizens annually is that car makers cheat the tests for diesel cars, causing many times more pollution on the road, said Greg Archer, the clean vehicles manager for Transport and Environment.

One key reason why air pollution kills 400,000 citizens each year is that car makers cheat the tests for diesel cars, causing much more pollution on the road, said Greg Archer, the clean vehicles manager for Transport and Environment.
