Environmental Technology

4. The act of controlling and especially reducing something.
5. A wall built across a river that stops the river's flow and collect the water
6. An area of a country or town that has fixed borders
8. The production of electricity by the force of fast moving water.
11. The fact of soil, stone, etc. being gradually damaged and removed by the waves, rain, or wind.
12. A form of energy that can be produced in several ways and that provides power

1. The people living in one particular area or people who are considered as a unit
2. Electricity produced using wind turbines.
3. A long, narrow open hole that is dug into the ground
7. A type of machine through which liquid or gas flows and turns a special wheel.
9. To keep someone or something safe from injury, damage, or loss.
10. A large sheet made of heavy waterproof material