Energy Conservation

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Across
  1. 1. What requires less watering that traditional grass lawns?
  2. 3. What can decrease the amount of electricity needed for lighting?
  3. 5. Using public transportation and ______ are also sustainable alternatives
  4. 6. What type of trees block the sun in summer and let it in in winter?
Down
  1. 2. What is an example of short-scale energy conservation?
  2. 4. What are more sustainable than traditional gas vehicles?