Toxic train derailment in Ohio: What to know

Weeks after a major train derailment and controlled explosion of chemicals in East Palestine, Ohio, residents have been encouraged to return home. But many questions remain about how the train derailed and what the lingering chemical exposure could be in residents' air and water.

source https://www.cnn.com/2023/02/15/us/toxic-chemicals-train-derailments-explainer/index.html