Environment Crossword

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Across
  1. 4. the clear liquid that has no color, taste, or smell, that falls from clouds as rain
  2. 6. something formed in the earth from plant or animal remains
  3. 7. a colorless and odorless gas that people need to breath
  4. 8. the interaction between the physical surroundings around us
Down
  1. 1. the plants occurring within a given region
  2. 2. to collect and treat used objects and materials that are ready to be thrown out in order to produce materials
  3. 3. chemical compound composed of one carbon and two oxygen atoms
  4. 5. animal life especially