Across
- 5. make, produce or create
- 6. the amount of harmful gases that are generated by our actions
- 8. not harmful to the environment
- 9. used again
Down
- 1. energy that comes from the sun
- 2. made in a way that causes little or no harm to the environment
- 3. things that use only as much energy as is needed
- 4. the natural world
- 7. the weather conditions in an area