Every day, hair salons sweep countless hair clippings off their floors and toss them into the trash without much thought. But in parts of France, Belgium, and Luxembourg, those discarded strands are finding an entirely different purpose: helping forests grow.

French recycling company Capillum has developed a surprisingly effective way to reuse human hair by turning it into biodegradable mulch that protects young trees from hungry deer. The company collects hair from participating salons and transforms it into flattened fiber sheets that can be wrapped around vulnerable saplings.

What sounds unusual at first actually solves several environmental problems at once.

A second life for salon clippings

Hair salons generate an enormous amount of waste each year. Most clippings are simply thrown away, even though human hair is remarkably durable because it is made largely from keratin, a........

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