True, but I don't think this invalidates OP's point. Nuclear disasters are scary in a different way.
Fossil-fuels powerplants produce surprisingly low air pollution due to all required by law filters, technologies etc.
(Source: it's discussed in the book The Uninhabitable Earth, although I don't have a copy to hand so can't find the exact citations.)
Very minor cognitive impairment levels can happen in worst-case scenario in 2100 and assuming current increase of CO2 concentration over time, it shouldn't happen before 2300.