Many reasons; *Industrial pollution (smog, waste and the fuckin' Bhopal disaster didn't help.) *Incest (Much like the middle east, there is also a culture of first-cousin fucking.) *Disease. (The River Ganges might as well be the first open air biological weapons facility) *exposure to feces and urine (its quite common to just shit and piss wherever you like in some parts of India.) *Really, really poor diet (not to mention any food made is likely to be made near exposed human waste or pollution.) *Birth Control is a hazy concept so with the massive numbers of children being born in India (Among all that shit and smog.) you will see more and more defectives born. And probably about 100 more reasons.
Man, what a misleading headline. It should said like, "Man in India gets eight teeth removed (and like a hundred really tiny ones)".