Fertilizers pose a growing threat to U.S. waterways

Nitrogen-based fertilizers, which came into wide use after World War II, helped prompt the agricultural revolution that has allowed the Earth to feed its 7 billion people.

But that revolution came at a cost: Artificial fertilizers, often applied in amounts beyond what crops need to grow, are carried in runoff from farmland into streams, lakes and the ocean. New research suggests that climate change will substantially increase this form of pollution, leading to more damaging algae blooms and dead zones in U.S. coastal waters.

Source: Fertilizers pose a growing threat to U.S. waterways;