While Chinese officials make full frontal regulatory attacks on smog, untreated sludge, an often toxic byproduct from sewage treatment, continues to quietly spread into groundwater and contaminate soil and food. One Tsinghua University study estimated that 34 percent of so-called “sludge,” which contains a mix of human excreta and industrial waste, ends up in landfills, … Continue reading Infographic: Conquering China’s Sludge Mountains