Environment

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Across
  1. 2. To rot or decompose; also, to decline in quality, energy, etc.
  2. 3. Gases and vapor (usually harmful)
  3. 5. A system in which waste materials are buried under the ground
Down
  1. 1. To send (used newspapers, bottles, cans, etc.) to a place where they are made into something new
  2. 2. The continuous absence of rain, thus causing the land to dry up
  3. 4. The gradual destruction by natural forces (such as water, wind, or ice) : the process by which something is eroded or worn away.