Environment

2. A mixture of decaying plants and vegetables.
3. The process of changing waste materials such as newspapers and bottles so that they can be used again.
8. A type of animal or plant that may soon become extinct.
13. Dangerous, especially to people's health or safety.
14. Using methods that do not harm the environment.
16. The process of removing the trees from an area of land.

1. Also called: atomic power.
4. The situation when an animal, plant, or language no longer exists.
5. Used about people who care about the environment.
6. Derived from living matter of a previous geologic time.
7. Energy or natural materials replace themselves by natural processes.
9. The increase of trade around the world.
10. It develops industries or makes them more modern.
11. A sudden short period of very cold weather.
12. A large machine like a windmill used for producing electricity from the wind.
15. A piece of equipment that uses energy from the Sun.