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Main Causes And Negative Effects Of Light Pollution In Hong Kong

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1. Introduction
Hong Kong enjoys a fame as the Pearl of Orient for its spectacular night scene, which is glittered with umpteen neon lights. Though manifesting the economic prosperity, the excessive illumination has aroused an implicit environmental problem: the light pollution. A recent survey by Chun Shing Jason Pun and Chu Wing So (2012) reveals that the average night-sky brightness of Hong Kong is 160 times brighter than a pristine sky, while in Tsim Sha Tsui this number staggeringly rises to about 1200, ranking the worst on the planet. This serious situation arouses considerable impacts on human health and the astronomy together with the disturbance to the ecology. Despite the severity of this issue, the Hong Kong government has made few efficacious countermeasures to alleviate the worrisome pollution.
This essay is to first disclose the main causes and negative effects of the light pollution and then review the current policies against this problem. Finally, three seemingly effective suggestions to both the government and the society will be proposed.
2. Main causes of the light pollution in Hong Kong
The main contributory factors of the light pollution are the excessive and improper illumination patterns. To begin with, the unlimited lighting time seems to be a significant cause. Chan Yu Ling (2014) states that his field observations discovered a substantial proportion of shops leaving their advertising light on after business hours, which seems to generally occur in
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