Across
- 2. A chemical used for killing insects
- 4. The place where an animal lives is called its _________
- 5. A place or area where waste materials are dumped
- 8. A slippery area, esp a patch of oil floating on water
- 10. The greenhouse effect is the main cause of __________ ________
- 12. Reuse material to make a new priduct
- 14. Gases ejected from an engine as waste products
- 15. Animals that may become extinct are ________
- 17. A mixture of smoke and fog
- 18. The descent of solid material in the atmosphere onto the earth, esp of radioactive material following a nuclear explosion
Down
- 1. A person or thing that is regarded as dangerous
- 3. The external surroundings in which a plant or animal lives
- 6. In many big cities, there is a lot of air ________
- 7. Garbage, rubbish, or trash
- 8. Waste matter from domestic or industrial establishments
- 9. Trees breathe in carbon dioxide and breathe out ______
- 10. Carbon dioxide is an example of a ___________
- 11. There is a hole in the _________ _________
- 13. A jungle where there is a lot of rainfall
- 16. There are too many ________ on the roads