Objections raised against low emission or clean air zones pertain often, to the restrictions on old vehicles and diesel cars in cities, stating that this move would hit the poorest of society first, and worst. However, researchers at the The University of West of England have combined the UK census and data on air pollution, with the annual vehicle safety inspection data. This study has found that citizens from poorer locations drive shorter distances and contribute to lesser air pollution as compared to wealthier ones. However, the poorer the neighborhood, the higher the air pollution levels are. This has been the scenario since 2003. The same has been spotted in the US, where black and Hispanic community centers suffer from air pollution the most.
The UK study shows that restricting diesel vehicles would impact poorer areas lesser, since diesel-run vehicles are predominantly owned by wealthier persons. The restriction on using older vehicles will have a small impact on poorer people as on an average, cars in the poorest localities were only one year older than those owned at the richest localities. This was owed to the multi-car households in the more expensive parts of the nation, and the age of the second, third and subsequent number of cars.