How is animals’ hair useful for plants and humans?
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because it helps to make woolen jackets, blankets etc.
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Human hair could be used instead of chemical fertilizers for some plants like lettuce, new research in a horticultural journal suggests. The hair, which is manufactured into cubes from barbershop and hair-salon waste, provides nitrogen for plants as it decomposes, just as natural-gas-derived sources like ammonia do.
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