Hong Kong smog exceeds recommended levels says WHO
3 July 2012 Last updated at 14:28 BST
Hong Kong's harbour is widely regarded as one of the world's most spectacular sights. But increasingly, that sight is obscured by smog.
The World Health Organisation says the city's air pollution now regularly exceeds recommended levels. The government is under pressure to do more, or Hong Kong could face losing new business.
Juliana Liu reports.