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