Report year and data year are different
State of Global Air 2024, produced by the Health Effects Institute in partnership with UNICEF, describes air pollution and health using data through 2021. It brings together exposure and burden-of-disease estimates across countries. Its title is the publication year, not the year when every reported health outcome occurred.
The estimated global burden
The report attributed an estimated 8.1 million deaths worldwide in 2021 to air pollution. More than 700,000 deaths among children under five were linked to air pollution. These are modelled population estimates spanning the report’s exposure categories, not a death count attributable to outdoor PM2.5 alone.
Attribution is an estimate
Burden estimates combine exposure data, baseline disease rates and exposure–response relationships, all with uncertainty. They do not identify which individual deaths would have been avoided or measure a person’s risk from today’s reading. Country-level estimates can also conceal substantial differences within a country.
Use global evidence for the right question
The report explains why air pollution deserves public-health attention and why children matter in that discussion. Keep the data year and scope explicit when quoting totals. To choose a route or activity today, use local current conditions rather than attempting to scale the global death estimate to one outing.
Sources
Educational information; personal health questions belong with your clinician.
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