ENVIRONMENT

2. to sort and collect rubbish in order to treat it and produce useful materials that can be used again
4. to keep someone or something safe from injury, damage, or loss
6. a long period when there is little or no rain
8. a fire burning in an area of land with many trees, that is difficult to control and sometimes spreads quickly
10. an extremely large wave caused by a violent movement of the earth under the sea

1. to become or to make something become smaller in size, amount, degree, importance
3. a sudden violent movement of the earth's surface, sometimes causing great damage
4. to make an area or substance, usually air, water, or soil, dirty or harmful to people, animals, and plants, especially by adding harmful chemicals
5. to damage something so badly that it cannot be used
7. a mountain with a large, circular hole at the top through which lava
9. to use something again