Across
- 4. Is a renewable energy source derived from animal waste
- 5. Are resources harvested from trees for various uses which can be replenished over time
- 8. Is a term used to describe various sources of non-renewable energy formed under the earth’s surface millions of years ago
- 9. Are sources of renewable energy derived from various materials such as yard and food waste
Down
- 1. Is created through the process of fermentation
- 2. Is a source of energy coming from the reservoirs of steam and hot water beneath the earth's surface
- 3. Is a term used to describe various sources of renewable energy coming from solid and liquid forms of matter
- 6. Utilizes specialized power cells known as photovoltaic cells which convert sunlight directly into electricity
- 7. Is a renewable and clean-burning energy source derived from various feedstocks