Across
- 1. A natural fuel like coal or oil, formed from ancient plants and animals
- 4. A gas we exhale that trees absorb
- 6. The practice of saving resources by using less
- 7. Type of pollution caused by loud sounds
- 9. Rain that contains harmful chemicals, damaging forests and rivers
- 10. The process by which plants make their food using sunlight
Down
- 2. Energy generated by sun
- 3. A type of energy created by moving water
- 5. The variety of plant and animal life in the world or a particular area
- 8. A flow of water in nature, often leading to lakes or oceans
- 11. A layer that protects us from the Sun’s harmful UV rays
- 12. It covers the Earth and supports all plant growth