Environment

2. to damage something so badly that it cannot be used.
4. an extremely large wave caused by a violent movement of the earth under the sea.
5. to make an area or substance, usually air, water, or soil, dirty or harmful to people, animals, and plants, especially by adding harmful chemicals.
7. one of many large rocks that circle the sun.
8. a fire burning in an area of land with many trees, that is difficult to control and sometimes spreads quickly.
10. to use something again.

1. a mountain with a large, circular hole at the top through which lava (= hot liquid rock) gases, steam, and dust are or have been forced out.
3. a sudden violent movement of the earth's surface, sometimes causing great damage.
6. a long period when there is little or no rain.
9. to stop someone or something from being killed, inju.red, or destroyed.
10. to treat things that have already been used so that they can be used again.