Across
- 2. Space is for organisms
- 4. studies how living things interact with each other and with their environment
- 6. Smog is .... in the air
- 7. Energy that never runs out
- 9. Energy is from the sun
- 11. Variety of life on Earth
- 12. an underwater ecosystem built by colonies of tiny animals
- 14. The geological process where soil and rock are worn away from one location
- 18. something that can continue for along time
- 19. Area is for protect an endanger species
- 22. Process of converting waste material into new material and objects
- 23. Animals at risk of extinction
- 24. loss of forest
Down
- 1. gas emission produced by fossil fuel burning
- 3. one of the photosynthesis product
- 5. long term shift in temperature and weather patterns
- 6. The number of people in specific area
- 8. Excess nutrients in water
- 10. Gases that trap heat from the sun and make the Earth atmosphere heat
- 13. Oil, coal and petroleum products
- 15. Taking too many fish
- 16. Waste that harms ocean
- 17. Leaders in city who make policies
- 20. Non-native species
- 21. Deficiency of the water shortage