Air quality is harmful in every corner of the globe, according to a new study.
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Just 0.001% of the global population is exposed to levels of particulate matter considered safe by the World Health Organization , according to the study, published earlier in March in theSign up to receive daily headline news from the Calgary SUN, a division of Postmedia Network Inc.By clicking on the sign up button you consent to receive the above newsletter from Postmedia Network Inc.
It found that while the daily levels of fine particular matter had been decreasing in Europe and North America in the 20 years leading up 2019, levels increased during that same time period in Southern Asia, Australia, New Zealand, Latin America and the Caribbean.Over 70% of the days in the study period had particulate matter concentrations higher than the WHO threshold for safety. Only 0.18% of the land on Earth had an annual exposure to fine particulate matter below the WHO limit.
“In this study, we used an innovative machine learning approach to integrate multiple meteorological and geological information to estimate the global surface-level daily concentrations,” Yuming Guo, professor at Australia’s Monash University, said in a The study found that some regions are seeing significantly more days with unsafe concentration levels than others. In eastern and southern Asia, more than 90% of days in the study period had daily particulate matter concentrations above the WHO threshold.Canada’s annual average particulate matter in 2019 was around 16.6 micrograms of pollutant per cubic metre, just above the WHO threshold.
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