Across
- 4. Farming and the growth of food
- 8. any substance which is unnatural and dangerous to the earth
- 9. the level of the ocean
- 10. the change in climate
- 11. animals at risk of dying out
- 14. an unreliable source of energy, made from dinosaurs
- 15. the security of food
- 16. energy made from wind
- 18. an ecological community
Down
- 1. the amount of people in an area
- 2. the Temperature and humidity in a longs space of time
- 3. the greenhouse gas that humans breathe out
- 5. an effect of global warming which causes deserts to increase in size
- 6. the gasses in the atmosphere that trap in heat
- 7. GHG excreted by cattle
- 12. a cause of global warming from the lack of trees and forests
- 13. energy derived from the radiation of the sun
- 17. the temperature in a short space of time