How do we fix air pollution? It's simple but it needs political will

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.