Energy Efficiency

5. The ability to perform a task using the least amount of energy possible.
7. An inspection or assessment of energy use in a building.
9. Material or structure designed to reduce heat transfer and improve energy efficiency.
10. The ability to do work or cause change.
11. Natural fuels such as coal, oil, and gas formed from ancient organisms.
13. Material used to prevent heat, sound, or electricity from escaping.
14. Devices that convert sunlight into electricity using photovoltaic cells.

1. The practice of reducing energy use to prevent waste.
2. The total amount of carbon dioxide produced by a person or activity.
3. Energy that comes from natural sources that replenish over time (like wind or solar).
4. A Device that automatically regulates temperature to save energy.
6. The measure of electrical power expressed in watts.
8. Able to be maintained over time without harming the environment.
10. Gases released into the air, especially from burning fuels.
12. Light bulbs that use less electricity and last longer than traditional bulbs.