Only 0.001 percent of the global population is exposed to WHO-safe levels.
From this approach, his team at Monash University School of Public Health and Preventive Medicine in Australia developed global grid cells from 2000-2019. These focused on areas above 15 μg/m³ , which is considered the safe limit by WHO.
They discovered that in the two decades leading up to 2019, daily levels in Europe and North America have decreased. From 2000 to 2019, the annual average PM2.5 level worldwide was 32.8 µg/m3. The highest PM2.5 concentrations were distributed in the regions of Eastern Asia and Southern Asia , followed by northern Africa .
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