Factsheet on WHO AQG - Health Effects of Air Pollution

Summary

Air pollution is a major hazard to human health and a leading cause of illness and death worldwide. After reviewing the best available scientific knowledge, in September 2021 the World Health Organisation (WHO) published revised recommendations for air quality levels to protect human health (WHO 2021). Informed by epidemiological evidence, the new guidelines are significantly lower than previous guidelines (WHO 2006).

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