Across
- 4. capacity for doing work; it powers everything we do.
- 5. Fuel type derived from ancient organic matter.
- 6. Energy sources like solar and wind.
- 9. Ability to maintain at a certain rate or level over the long term.
- 11. Careful use of resources to prevent waste.
- 12. Energy harnessed from the sun.
- 13. Looking ahead; what the documentary explores.
- 14. The typical weather conditions in a region over a long period.
Down
- 1. Air movement used to generate energy.
- 2. Element whose dioxide is a major greenhouse gas.
- 3. The gradual loss of something important or essential.
- 6. supplies that can be drawn upon when needed.
- 7. Release of pollutants into the atmosphere.
- 8. Using less energy to perform the same task.
- 10. Energy derived from Earth's internal heat.