Environmental Puzzle

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Across
  1. 3. the process of changing old items into new useful products
  2. 5. a sudden shaking of the Earth caused by movement in the crust
  3. 7. What is one type of waste that is difficult to decompose?
  4. 8. a large area filled with trees that is home to many animals and plants
Down
  1. 1. a problem caused by too much trash in the environment?
  2. 2. what gas to breathe that is released in plants is?
  3. 3. what happens when the weather is cloudy?
  4. 4. where should we throw the trash?
  5. 5. a system formed by living organisms and their physical environtment
  6. 6. what is the cause of throwing garbage in the river?