Hong Kong as Dirtiest Financial Center Is Tsang’s Legacy Harboring an unlicensed duck in Hong Kong can land a fine of HK$50,000 ($6,440) after the world’s first human deaths from bird flu were recorded in the city 15 years ago. That’s 50 times the penalty for driving a vehicle belching smoky fumes. Failure to force aging buses and trucks off Hong Kong’s streets is a key cause of air pollution that results in more than 3,000 premature deaths a year, according to Civic Exchange, a think tank. In contrast, the H5N1 virus has killed 350 people worldwide since 1997, World Health Organization data show. Nice twist on a largely ignored story, but nice to see Bloomberg stepping up.