This is one of the great unreported stories. China's economy has been on a tear for nearly a decade. Lots and lots of cheap manufacturing of products sold abroad. Besides a billion people and cheap labor, one of the reasons for cheap production costs is because they take sludge, heavy metals, and all sorts of industrial waste and byproducts and simply throw it in the back yard. That is unsustainable. They are destroying their land - rivers, lakes, waterways, soil, for short term gain.
I think that the Chinese limit to tolerating such indiscriminate dumping of pollutants is fast approaching. The environmental and the resulting social cost is simply too high. The time of making fast bucks from Chinese products at rock bottom price appears to be passing.