Since the longest lived isotope of sulfur has a half-life of 87 days, those coal...

hollerith · on Nov 10, 2019

Not necessarily: the sulfur might be continually created from the decay of a radioisotope of longer half-life.

pfdietz · on Nov 10, 2019

It's not.

Let's be clear: the claim that burning coal releases radioactive sulfur and carbon is wrong. There are radioactive materials released, but they are from contaminants like uranium and its decay products.