Manure

...is now the biggest cause of water pollution in China, where hog CAFOs are increasing, blue-green algae blooms are rampant, Chinese fishermen are in big trouble, water tables are plummeting under cornfields, and in general, everything sounds uneasily familiar. http://www.midwestproducer.com/news/regional/swine-building-pioneer-charles-sand-dies/article_cb6c5a30-3268-11e2-b15d-001a4bcf887a.html