“Particulate pollution in China declined by 41 percent between 2013 and 2022 and by 3.4  percent from 2021 to 2022 alone. Because of these air quality improvements, the average Chinese citizen can expect to live 2 years longer, provided the reductions are sustained. Beijing province experienced the largest decline in pollution, dropping 54.1 percent in just nine years. If this success is sustained, the average person living there could expect to live 3.9 years longer.”

From University of Chicago.