Across
- 2. zoos organize ... programmes for species that wouldn't survive in the wild
- 4. one of the global problems the world has to face
- 6. a ... diet might be a solution to the food crisis
- 7. (2)devices used for generating energy from the Sun's rays
- 9. the gradual increase in the temperature of the Earth's atmosphere
- 14. (2)a greenhouse gas
- 15. (3)can be good places to generate energy if we can minimize their dangers
- 16. illegal hunting
- 17. a shortage of farmland is mostly caused by ...
- 19. ... crops are more drought-resistant and disease-resistant
- 20. a reason why animals might become extinct is the loss or destruction of their natural ...
Down
- 1. (2)might be a possible solution to the food crisis
- 3. the Black Rhino, the Blue Whale and Orangutans ane all ... species
- 5. solar, wind and geothermal energy are all ... energy sources
- 8. increased CO2 causes ... in the oceans
- 10. invasive plants and animals can reduce ...
- 11. we can reduce pollution by ... our waste
- 12. chemical ... make the soil richer
- 13. (2)non-renewable energy sources are also called ...
- 18. the amount of CO2 released by a company/household is their carbon ...