Energy sources

1. renewable source of energy that generates power by using a dam
6. radiant energy emitted by the sun.
8. the action of using something again.
9. energy from a source that is not depleted when used, such as wind or solar power
10. energy generated or produced by living or once-living organisms
11. heat within the earth.
12. is the process by which the wind is used to generate mechanical power or electricity.

2. convert waste into reusable material.
3. introduction into the environment of a substance or thing that has harmful or poisonous effects.
4. a principle stating that energy cannot be created or destroyed
5. sources that will run out or will not be replenished in our lifetimes
7. make smaller or less in amount, degree, or size.