Trichloroethylene

https://www.cancer.gov/about-cancer/causes-prevention/risk/substances/trichloroethylene

Widely used chemical strongly linked to Parkinson’s disease - https://www.science.org/content/article/widely-used-chemical-strongly-linked-parkinson-s-disease - Common environmental contaminant increased rate of neurodegenerative affliction in one population by 70%