Across
- 3. Decayed organic material used as a plant fertilizer.
- 4. our world.
- 6. earth's largest natural source of energy.
- 9. Earth day is celebrated in this month.
- 10. Transfer of energy from plants through a series of animals to humans.
- 12. Clearing a wide area of trees.
- 13. smaller or lesser in size.
- 14. Gradual increase in the overall temperature of the earth's atmosphere.
Down
- 1. Substances or things introduced into the environment that has harmful or poisonous effects.
- 2. Absorbs the sun's rays as a source of energy that generates electricity.
- 5. Converting waste into reusable material.
- 7. Reusing discarded objects to create a product of higher value than the original.
- 8. protect from harm or destruction (environment)
- 11. Plants and trees release it into the air.