Published 2025
“…FindingsIn 2021, 2·67 billion (95% uncertainty interval [UI] 2·63–2·71) people, 33·8% (95% UI 33·2–34·3) of the global population, were exposed to HAP from all sources at
a mean concentration of 84·2
μg/m3. Although these figures show
a notable reduction in the percentage of the global population exposed in 1990 (56·7%, 56·4–57·1), in absolute terms, there has been only
a decline of 0·35 billion (
10%) from the 3·02 billion people exposed to HAP in 1990. …”
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