Soil

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Across
  1. 4. when too many toxins are present and change the environment
  2. 5. the process of plant and animal remains rotting
  3. 6. a mix of tiny rocks and decomposed plants
  4. 7. tiny pieces of broken rock in soil
Down
  1. 1. a hole or tunnel dug underground by a small animal to live in
  2. 2. the type of soil where plants grow from
  3. 3. a mix of decomposing plants and animals