Osteosarcoma is a RARE form of bone cancer.
Thus, after 50+years and billions of exposures to flouride, it seldom appears in the exposed population.
The causative link is imaginary. More scientific moonbat-ery.
The benefits are imaginary.
So, perhaps one American in a million is afflicted with it naturally, and because of fluoridation five Americans in a million are afflicted with it. Horrible! But what are the positive effects of the fluoridation on the rest of the million people?