Environment

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Across
  1. 5. the variety of life in the world or in a particular habitat or ecosystem
  2. 7. conserving an ecological balance by avoiding depletion of natural resources
Down
  1. 1. Air (relatively) devoid of pollutant materials (2 words)
  2. 2. the production and discharge of something, especially gas or radiation
  3. 3. Any substance which is discarded after primary use, or it is worthless, defective and of no use
  4. 4. designed, produced, or operating in a way that minimizes harm to the natural environment
  5. 6. the phenomena of the physical world collectively, including plants, animals, the landscape, and other features and products of the earth
  6. 8. power derived from the utilization of physical or chemical resources, especially to provide light and heat or to work machines