Pungent brown sewage spews into the Pacific ocean. In the background, cranes put up hotels and beachfront apartments.
Once home to monkeys, turtles and other rare wildlife, this stretch of coast in northwest Costa Rica is developing so fast that it is tarnishing the country’s reputation as a destination for eco-tourists.
Some 1.4 million people visit Central […]

This sprawling, jade-hued lake in eastern China is pleasant enough on a cool spring day. But when spring warms into sultry summer, Chaohu turns slimy and stinky as algae fed by sewage, farm and factory runoff bloom, leaving it toxic and undrinkable.
China’s pollution busters, banking on a rather unorthodox approach, are hoping this summer might […]