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Mitigating the air pollution effect? The remarkable decline in the pollution-mortality relationship in Hong Kong
Chun Wai Cheung1, Guojun He1, Yuhang Pan1
1Hong Kong University of Science and Technology, Hong Kong.
Abstract:
Using transboundary pollution from mainland China as an instrument, we show that air pollution leads to higher cardio-respiratory mortality in Hong Kong. However, the air pollution effect has dramatically decreased over the past two decades: before 2003, a 10-unit increase in the Air Pollution Index could lead to a 3.1% increase in monthly cardio-respiratory mortality, but this effect has declined to 0.5% using recent data and is no longer statistically significant. Exploratory analyses suggest that a well-functioning medical system and immediate access to emergency services can help mitigate the contemporaneous effects of pollution on mortality.
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