Choke a bloc
Hong Kong's air pollution hit an alarming high on September 14, with the index rising to over 200. This is the highest it has risen since air quality monitoring was introduced in 1995. Experts lay the blame on China. According to World Health Organization reports, China houses seven of the world's 10 most polluted cities. Most of the pollution cloaking Hong Kong is generated by coal-fired power plants and smokestacks from China's industrial south, as well as traffic fumes from the city's own congested streets (see