Environmental problems

4. The introduction of harmful materials into the environment
10. An animal of an endangered species
11. An alternative source of energy
13. Intended to be used only once and then thrown away
15. This species of animals are called so because they are near extinction
17. The protection of nature
18. The process of converting waste materials into new materials and objects
20. The process of making something dirty or poisonous
21. Some people say it is the cause of Iraqi and US war
22. Destroying forests by cutting down trees

1. The phenomenon of increasing average air temperatures near the surface of Earth over the past one to two centuries; global _____
2. The process by which microorganisms break down organic matter
3. An extremely large wave caused by a violent movement of the earth under the sea
5. Type of energy that could have disastrous consequences on the planet
6. The state whereby the human population rises to an extent exceeding the carrying capacity of the ecological setting
7. (name of the heavy metal song) Gojira - Toxic ______ Island
8. This oscar-winner actor has relentlessly proven to be one of the most outspoken environmentalist in the Hollywood, he was in that movie about THE ship)
9. Millions of animals are killed by this synthetic material
12. Unwanted or unusable materials
14. A situation in which a type of animal no longer exists
16. A type of aircraft that contributes greatly to emitting carbon dioxide
19. Is an independent global campaigning network, founded in Canada in 1971 by Irving Stowe and Dorothy Stowe