Across
- 5. to stop something from working
- 6. to make something clean
- 7. a product or action that doesn't harm the environment is described as...
- 9. wind and solar energy are examples of this kind of energy
Down
- 1. to reduce the amount of heat using a control
- 2. to finish the last bit of something
- 3. to allow to escape
- 4. a fuel that cannot be replaced when it has been used up is described as...
- 8. fuel coal, oil and gas are examples of these