it's always nice to see a male member of the public lecture scientists about how their research and evidence-based information is invalid.

according to wikipedia:

Researchers know the dirt in the Chernobyl exclusion zone can contain radionuclides including cesium-137, strontium-90, several isotopes of plutonium and uranium, and americium-241. Even at very low levels, they're all toxic, carcinogenic or both if inhaled.