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Topsoil is useful to humans because:

  1. you cannot plant into bedrock
  2. plants need nutrients in topsoil to grow
  3. we would not have grains and vegetables without topsoil
  4. if topsoil is eroded away, our streams and lakes would clog with dirt; fish would die; wildlife would die
  5. without topsoil, we would not have bacterial growth to decompose leaf litter
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8y ago

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