New 6-yr study on PM2.5: 80% of the global population lives in places where concentrations of PM2.5 exceed the tightest air quality guideline set by the World Health Organization (WHO) of 10 micrograms per cubic meter (µg/m3). Even by the laxest WHO stds, 38% of central and 50% of eastern Asia exceeded the guidelines....
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WHO Air Quality Guidelines
80% of Global Population Living in Areas with PM2.5 Concentrations Exceeding Levels Recommended by WHO
Understanding how the WHO Air Quality Guidelines apply to Hong Kong’s high daily levels of air pollution
The following is an explanation from Professors Hak kan Lai, Chit-ming Wong and Anthony Hedley from Hong Kong University about why we should be comparing our daily air pollution levels, which are extremely high, to the ANNUAL, rather than short-term guidelines for each of the 4 pollutants studied by the World Health Organization. If...
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