Pollution fix

The manipulation of vehicle exhaust emissions by at least one unscrupulous car manufacturer may have led to ill health and even to premature deaths because of the significant impact on world pollution levels, according to a study by researchers at Northwestern University and their colleagues. The researchers used an EPA tool to assess the health and economic impact of the illegal manipulation of nitrogen oxide emissions by Volkswagen vehicles. The vehicles had on-board software to circumvent emissions testing and make them run cleaner during tests than they would on the road. Half a million cars are known to have been tampered with in this way.