If humans were truly in danger from eating 'contaminated' fish, then we would have all died when we started to introduce coal smoke into our atmosphere (contain

If humans were truly in danger from eating 'contaminated' fish, then we would have all died when we started to introduce coal smoke into our atmosphere (contains Caesium 137 and most plants emit more radiation per year than a nuclear plant does in its lifetime) and when the Crab Nebula decided to show its pretty colours (gamma and x-ray radiation) in the daytime centuries ago.