In a world searching for more sustainable ways to manage waste, the promise of turning "trash into treasure" is hard to ignore. Take nitrate pollution, for example. Every year, nitrogen fertilizers ...

Mangrove forests around the world provide a largely overlooked nitrogen-pollution cleanup service — one that, if humans had to pay for it, would cost $8.7 billion per year, a new study estimates.

For decades, pollution clean-up has relied on expensive technologies, large-scale engineering projects, and chemical treatments. Now, scientists are exploring a different ally in the fight against ...