New Zealand, which promotes a green and unpolluted image to the world, has long hid a dark secret – the ‘land of the long white cloud’ has no vehicle exhaust emission controls whatsoever. Now it has finally been caught out. Michael Walsh, a US-based consultant who advises governments and international organisations such as the World Bank on air safety issues, expressed astonishment during a recent visit that a country which promotes itself on its ‘clean-green’ image could be the only country in the OECD that lacks any legislation controlling vehicle exhaust emissions.