Across
- 3. which of these energy sources is renewable?
- 4. what do you call the area that is inhabited by a particular species?
- 8. What is the most used renewable energy source in the world?
- 9. a natural fuel such as coal or gas
- 10. What do you call the processing of used materials and their reuse?
- 11. Which of the following is biodegradable?
Down
- 1. which gas is responsible for global
- 2. what do you call renewable safe sources of energy?
- 5. What do you call the rain thatcontains many chemicals and is harmful?
- 6. the process by which the Earth’s temperature is increasing is called the ...
- 7. what do you call a substance that pollutes the air, water or soil?