1. Health Effects Institute. State of global air 2019. Special Report. Health Effects Institute, Boston, MA, 2019.
2. World Health Organization. 7 Million premature deaths annually linked to air pollution, http://www.who.int/mediacentre/news/releases/2014/air-pollution/en/ (2014, accessed 11 April 2020).
3. The World Bank. Health effects of outdoor air pollution. South Asia Urban Air Quality Management Briefing Note, 11, http://www.worldbank.org/sarurbanair (2003, accessed 15 April 2020).
4. Social Big-Data Analysis of Particulate Matter, Health, and Society