PM2.5 precursor emissions have declined over the course of several decades, following the implementation of local, state, and federal air quality policies. Estimating the corresponding change in population exposure and PM2.5-attributable risk of death prior to the year 2000 is made difficult by the lack of PM2.5 monitoring data.
Original Source [2]
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/estimated-changes-life-expectancy-and-adult-mortality-resulting-declining-pm25
[2] https://ehp.niehs.nih.gov/ehp507/
[3] http://admin.indiaenvironmentportal.org.in/category/author/neal-fann
[4] http://admin.indiaenvironmentportal.org.in/category/author/sun-young-kim
[5] http://admin.indiaenvironmentportal.org.in/category/author/casey-olives-et-al
[6] http://admin.indiaenvironmentportal.org.in/category/journal/environmental-health-perspectives
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/pm-25
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/united-states-america-us
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution