1. (1988). The World Bank Annual Report 1998 (English), World Bank Group. Available online: http://documents.worldbank.org/curated/en/390771468320070967/The-World-Bank-annual-report-1998.
2. (2023, November 28). EPA Agency, USA, Available online: https://www.epa.gov/acidrain/acid-rain-program.
3. (2024, January 11). 2022 Report on the State of the Ecology and Environment in China, Ministry of Ecology and Environment, PR China, Available online: https://english.mee.gov.cn/Resources/Reports/soe/SOEE2019/202312/P020231206607194894058.pdf.
4. Associations between short-term exposure to ambient sulfur dioxide and increased cause-specific mortality in 272 Chinese cities;Wang;Environ. Int.,2018
5. Srivastava, R.K. (2003). Controlling SO2 Emissions: A Review of Technologies, Nova Science.