https://en.wikipedia.org/wiki/Great_Smog_of_London

https://www.aei.org/carpe-diem/chart-of-the-day-coal-mining-deaths-in-the-us-1900-2013/

https://www.tceq.texas.gov/remediation/superfund/sites/byname.html

https://en.wikipedia.org/wiki/Brio_Superfund_site

https://pcs.harriscountytx.gov/Maps/Superfund-Sites

https://insideclimatenews.org/news/09032023/inside-clean-energy-texas-renewables/