Across
- 2. Bulb type that uses little power
- 6. Heat from the earth
- 9. A type of Design that uses natural energy flows
- 10. Material that keeps buildings warm or cool
- 12. A natural fibre that can be used as insulation in walls
- 13. Energy sources like sun and wind that don't run out
- 14. System for heating, ventilation, and air conditioning
- 16. Gases that trap heat in atmosphere
- 19. Power from turbines in breezy areas
- 20. Wind energy converter
Down
- 1. Reduce waste by reusing materials
- 3. Protecting resources like energy
- 4. Gases released that harm the environment
- 5. Power harnessed from sunlight
- 7. Using less energy to do the same job
- 8. A term used to describe the measure of one's environmental impact
- 11. Upgrading an old building for better energy use
- 15. Check of home energy use
- 17. Practices that last without harming the planet
- 18. Solar device on roofs