Puzzle

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Across
  1. 2. the organism that undergoes the process photosynthesis
  2. 5. A synthetic polymer that polutes the earth
  3. 6. the process of clearing forests
  4. 7. covers 97% of the earth
  5. 8. the melting of ice glaciers
  6. 9. A species in the risk of extinction
Down
  1. 1. the method of collecting rainwater and saving it
  2. 3. The process that plants use to make their own food
  3. 4. the 6- letteredword of the 3 (R's)