For instance, the idea that the Navy's sonar systems are harming whales is about as well based in fact as the 1960s fear that fluoride in our water was poisonous.
He found high levels of poisonous heavy metals in the water and believed there was a direct connection between incidences of cancer and mining in the area.
They have to contend with pork that is sometimes injected with water to make it heavier or, worse still, with poisonous chemicals to make the meat less fatty.