https://en.m.wikipedia.org/wiki/East_Palestine,_Ohio,_train_derailment

https://www.wdtn.com/news/east-palestine-we-will-never-forget-you-vp-vance-annouces-new-study-on-the-train-derailment/

https://theconversation.com/toxic-chemicals-from-ohio-train-derailment-lingered-in-buildings-for-months-heres-what-our-investigation-found-in-east-palestine-238511

https://www.pbs.org/newshour/nation/a-year-after-a-train-derailment-in-ohio-spilled-hazardous-chemicals-health-fears-persist-for-east-palestine

Acids and bases.
1-10
Knowledge of chemistry needed.
Limestone is powdered used to raise ph conditions of acidic soil.

Chemistry.

https://content.ces.ncsu.edu/soil-acidity-and-liming-basic-information-for-farmers-and-gardeners