Across
- 3. The action of using something more than once.
- 5. The primary greenhouse gas emitted by human activities.
- 9. An arrangement between people to make a regular journey in a single vehicle.
- 10. The process of transforming decayed organic material into plant fertilizer
- 11. The action or process of converting waste into reusable material.
Down
- 1. The ability to be maintained at a certain rate or level.
- 2. The type of power obtained by harnessing the energy of the wind.
- 4. The type of power obtained by harnessing the energy of the sun's rays.
- 6. The air we breathe.
- 7. The third planet in our solar system from the sun.
- 8. Fuels that come from old life forms that decomposed over a long period of time
