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Over the past decades, both ambient and household air pollution have changed in several aspects, including the emission sources and the concentrations of pollutants, in many Chinese cities. It is unknown whether these changes are associated with changes in health conditions, especially given changes in other factors due to rapid economic growth.

journal of thoracic disease

The effects of indoor and outdoor air pollution on the prevalence of adults’ respiratory diseases in four Chinese cities: a comparison between 2017–2018 and 1993–1996