Across
- 2. Energy from the sun
- 4. Layer of gases surrounding earth
- 7. this liquid made from petroleum can cause major damage if spilt
- 8. A wild plant growing where it's unwanted
- 11. introduced species eg fox, carp.
- 12. plants, animal, and the landscape are all part of this
Down
- 1. this type of change is blamed for rising sea levels
- 3. this is the name for recycling food scraps, grass clippings and weeds
- 5. plastic bags in our waterways causes this
- 6. What we should do with aluminium cans
- 9. The planet we live on
- 10. The most precious resource on earth