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Science

Pollution

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Eutrophication

A major problem with the use of fertilisers occurs when they're washed off the land by rainwater into rivers and lakes. The resulting increase of nitrate or phosphate in the water encourages algae growth, which forms a bloom over the water surface. This prevents sunlight reaching other water plants, which then die. Bacteria break down the dead plants and use up the oxygen in the water so the lake may be left completely lifeless.

Eutrophication

The increase of nitrate or phospate from fertilisers into water causes eutrophication

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Back to Problems and solutions in the environment index

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