Emissions in the news - when will the government wake up?

In a week when we have seen evidence of further emissions cheating in Japan
(http://www.bbc.co.uk/news/business-36089558) while VW agrees compensation deals for its use of defeat devices in the US (http://www.bbc.co.uk/news/business-36103903), and DfT finally provides evidence that real-world emissions across all motor manufacturers are on average six times higher that the type approval tests (https://www.gov.uk/government/publications/vehicle-emissions-testing-programme-conclusions), how then can the PM continue to defend the motor industry (http://www.airqualitynews.com/2016/04/21/prime-minister-defends-car-industry-over-diesel-emissions/) that has proven itself time and again to not have public health interests at heart. When will the government wake up to the incontrovertible proof that our motor industry is killing us and that no amount of economic growth can justify that!