Friday 6 January 2017 16.24 GMT
We know diesel vehicles are the key culprit, but when it comes to both long-term solutions and emergency measures the govenment has been asleep at the wheel
Cutting toxic levels of city air pollution to safer levels is simple, but not easy – it requires resolve. Yet, despite the key culprit in the UK being well known – diesel vehicles – the government has been asleep at the wheel for years.
Levels of nitrogen dioxide have been illegally high across much of the UK since 2010. In 2015 86% of major urban areas broke annual limits. Cutting this pollution means choking off diesel emissions and there is a wide range of effective measures available.
Creating zones in city centres where polluting cars are either banned or charged is important, while making cities safe for cycling and walking cuts traffic too.