CNN Travel reported that Hong Kong is densely populated and is one of the most light-polluted cities in the world. Excess artificial light after dusk can cause sleeplessness, according to the American Academy of Neurology.
Dr Esther Lau Yuet-ying, Assistant Professor of the Department of Psychology, who studies sleep, was quoted as saying that Hong Kong is well-known as a sleepless city. In addition to population density and light pollution, Dr Lau said sleep in the city is also disrupted by factors such as long work hours, stressful lifestyles and bad habits including late meal times and the nighttime use of digital devices.
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