What about lorries and vans? If they are included then the price of all goods will rise.... The poorest areas have the highest pollution because the poor people drive the older cars and they are driving around all day because they have no jobs (visit, for examples, Newham, Croydon and you will see the volume of traffic on the roads at all times). Also, education is needed- poor people tend to think- I need a new car and then buy something old for ?200 and run it into the ground.... Other cities have tried other methods https://www.theguardian.com/cities/2014/mar/20/licence-plate-driving-bans-paris-ineffective-air-pollution further down the article it appears that Berlin has been the most successful (why it is last on the list beats me) Electric cars are scary- I did not realise that I use my hearing INITIALLY when crossing the road and nearly got run over by an almost silent electric car- it was very alarming.