Aerials of Yingfeng Chemical Company factory, Phosphogypsum waste heap and Greenpeace campaigners sampling at Hong Da Chemical Company waste heap. China is the world’s largest phosphate fertilizer producer, with a total of more than 300,000,000 tons of phosphogypsum left behind as an industrial by-product. This massive amount of solid waste contains harmful chemicals and is difficult to reuse. It is causing long-term pollution in in Sichuan, Yunnan, Hubei and other provinces, where the phosphate industry is concentrated.