World-first study into global daily air pollution shows almost nowhere on Earth is safe

In a world-first study of daily ambient fine particulate matter (PM2.5) across the globe, a Monash University study has found that only 0.18% of the global land area and 0.001% of the global population are exposed to levels of PM2.5—the world's leading environmental health risk factor—below levels of safety recommended by World Health Organization (WHO).