Telegraph: But along the snow-specked valley that meanders out from this remote industrial hub in northwest China, the real danger appears to be coming not from above but from below.
"The pain is chronic and it is hard to tell when it will start,' said Lei Deli, a 60-year-old resident of Minqin, one of half a doze villages along Gansu province's East Dagou canal where locals complain of inexplicable and crippling leg pains. "Sometimes it goes away for a whole month. But when it really hurts, I can't walk...