Hong Kong has been named the world's worst city for light pollution. Commercial and residential areas Mong Kok, Tsim Sha Tsui and Causeway Bay are found to be the most severe areas of light pollution. Due to the spotlights and LED billboards, Hong Kong’s sky is many times brighter than other cities.[1]
^Pun, C.S. (2012), Report of Hong Kong Night Sky Brightness Monitoring Network(PDF)
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