Air quality is particularly worrisome in regions such as southern Asia and eastern Asia, the study found. Read more at straitstimes.com.
MELBOURNE – It’s no secret that air pollution is a serious problem facing the world today. Just how serious? A new study on global daily levels of air pollution shows that hardly anywhere on Earth is safe from unhealthy air.
Conducted by scientists in Australia and China, the study found that on the global level, more than 70 per cent of days in 2019 had daily PM2.5 concentrations exceeding 15 micrograms of gaseous pollutant per cubic meter – the WHO recommended daily limit. “I hope our study can change the minds of scientists and policymakers for the daily PM2.5 exposure,” said Dr Yuming Guo, the lead researcher and an environmental health professor at Monash University.
Dr Guo and his co-authors overcame that challenge by marrying ground-based air pollution measurements collected from more than 5,000 monitoring stations worldwide with machine learning simulations, meteorological data and geographical factors to estimate global daily PM2.5 concentrations. Fine particulate matter is made up of soot from vehicles, smoke and ash from wildfires and biomass cook-stove pollution, plus sulfate aerosols from power generation and desert dust.
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