“One key reason why air pollution kills 400,000 citizens annually is that carmakers 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. “The development of a new real-world driving emission test is an important step forward to tackling urban air pollution. EU states should now support the Commission’s proposals and ignore the whinging from carmakers that the rules are too tough.”
http://www.theguardian.com/environment/2015/feb/03/car-makers-face-real-world-emissions-tests-in-eu-pollution-clampdown