Sewer waste management is dirty work. In the current labor market, it’s not a job many people are interested in. But cities have to get it done for public health and infrastructure integrity. “Looks ...

The municipality has invested millions to pressure cook sewage sludge, in hopes of cutting its climate pollution.

Editor’s Note: Call to Earth is a CNN editorial series committed to reporting on the environmental challenges facing our planet, together with the solutions. Rolex’s Perpetual Planet initiative has ...