The Biden administration says it could soon launch a formal evaluation of risks posed by vinyl chloride, the cancer-causing chemical that burned in a towering plume of toxic black smoke following the fiery train derailment in East Palestine, Ohio.

The Biden administration says it could soon launch a formal evaluation of risks posed by vinyl chloride, the cancer-causing chemical that burned in a towering plume of toxic black smoke following the fiery train derailment in East Palestine, Ohio.