Across
- 5. A natural fuel such as coal or gas, formed in the geological past from the remains of living organisms.
- 6. The Greenhouse effect produces an increase of this
- 7. Long period when there is little or no rain
- 8. Species that may soon not exist because climate change or other ressons
- 9. The action or process of converting waste into reusable material
- 10. An increase of temperature of the Earth
Down
- 1. Chopping down trees causes this
- 2. The variety of species on Earth
- 3. Large amount of water specially in a way that causes problems
- 4. The second main gas responsible for the greenhouse effect