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. About 99.82% of the global land area is exposed to levels of particulate matter 2.5 (PM2.5) — tiny particles in the air that scientists have linked to lung cancer and heart disease — above the safety limit recommended by the Word Health Organization, according to the peer-reviewed study published Monday in Lancet Planetary Health. And only 0.001% of the world’s population breathes in air that is considered acceptable, the paper says.
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