IQAir said the data utilised to create this report was aggregated from the global distribution of more than 30,000 regulatory air quality monitoring stations and low-cost air quality sensors operated by research institutions, governmental bodies, universities and educational facilities, non-profit non-governmental organisations, private companies and citizen scientists.The 2022 World Air Quality Report included data from 7,323 locations in 131 countries, regions and territories.In 2023, those numbers have grown to include 7,812 locations in 134 countries, regions and territories.Causing an estimated one in every nine deaths worldwide, air pollution is the greatest environmental threat to human health.According to the WHO, air pollution is responsible for an estimated seven million premature deaths worldwide every year.Exposure to PM2.5 air pollution leads to and exacerbates numerous health conditions, including but not limited to asthma, cancer, stroke and lung disease.Exposure to elevated levels of fine particles can impair cognitive development in children, lead to mental health issues, and complicate existing illnesses, including diabetes.
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