“…Moreover, the study stated that social and economic factors played a crucial role in health inequality due to PM 2.5 [17] .By contrast, most Asia-Paci c (APAC) countries have been experiencing a rise in air pollution-related mortality and the highest levels of PM across the world [18,19] . Additionally, there are few studies dealing with the association between socio-demographic indexes (SDI) -measured by income and education [20] -on air pollution-related mortality in APAC [21,22] . Thus, we focus on the UN region of APAC, as a highly polluted region, and compare it to Europe, as an improved air region, additionally we study PM mortality by sociodemographic levels in both regions.…”