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Environmental Science

Using Constructed Wetlands to Treat Agricultural Runoff

Quick fact

Constructed wetlands can remove up to 90% of excess nitrogen from agricultural runoff by combining plant uptake and microbial denitrification—without using a single drop of electricity.

Why this is interesting

Every time it rains, farmland releases a cocktail of fertilizers, pesticides, and soil into nearby rivers—but some farmers are turning that pollution into a natural filtration system. How can a planted ditch work like a water treatment plant?

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Using Constructed Wetlands to Treat Agricultural Runoff

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