evidence: In the last few years, governments and corporations around the world have come under increasing pressure to act on a global air pollution crisis. In Europe, nitrogen dioxide (NO2) has been at the centre of the debate, following the dieselgate scandal and numerous legal battles faced by governments that have been shown to be in breach of legal limits. [...] NO2 also has a detrimental effect on biodiversity, inhibiting plant growth. In the UK, it’s been estimated that (pdf) 63% of the most sensitive wildlife habitats have been affected by excessive nitrogen deposits.