Toxic spill concerns in China

Toxic waste from a Chinese zinc smelter halted water supplies from a river for eight hours and threatens cities downstream.

Cadmium levels have been 10 times normal in the Shaoguan city section of the North River in Guangdong, the Guangzhou Daily said.

"The Shaoguan smelter illegally discharged the cadmium-containing waste water during an overhaul of equipment."