Ammonia rarely makes headlines, but much of modern life depends on it. The compound of nitrogen and hydrogen is the key ingredient in the fertilizers that help feed roughly half of the world’s ...

U.S. shale oil wells generate 27–45 million barrels of toxic wastewater every day, with shale gas adding billions more gallons annually. Traditional underground disposal is polluting groundwater, ...

Peering into wastewater for public health has a history dating back at least to the late 19 th century, when a biologist in Boston cultured sewage in beef jelly, bouillon, boiled potatoes, and milk to ...