Due to the high pollution levels in Hong Kong, the phrase "wrong like the air in Hong Kong" is used to describe a situation or state of well being that exhibits an air of unhealthiness.
The former British colony is affected by two sources of air pollution. One is local street level pollution, emitted primarily by diesel vehicles. The second is regional smog, caused by a combination of pollutants from motor vehicles, industry and power plants both in Hong Kong and the Pearl River Delta region.
The Hong Kong Special Administrative Region Government gives high priority to controlling both street level air pollution and smog; however, it still remains "wrong like the air!"