Conservation of Natural Resources Big 20

7. To save or reduce the use of something.
8. Harmful substances in the air, water, or soil.
10. Resources that are being used up faster than they are made.
11. A renewable resource that comes from the heat from inside the Earth.
12. The energy released by a fission or fusion reaction; the binding energy of the atomic nucleus.
13. The energy received by Earth from the sun in the form of radiation.
14. The use of air flow through wind turbines to mechanically power generators.
15. Energy-rich substances formed from the remains of once living organisms
19. A gas that contributes to the greenhouse effect by absorbing infrared radiation, e.g., carbon dioxide and chlorofluorocarbons.
20. A change in global or regional climate patterns.

1. Resources that are constantly being supplied.
2. Able to be maintained at a certain rate or level.
3. . The process of recovering valuable or useful materials from waste or scrap
4. A gradual increase in the temperature of Earth’s atmosphere.
5. Electricity produced by the kinetic energy of water moving over a waterfall or dam.
6. Any natural material that is used by humans, such as water, petroleum, minerals, forests, and animals.
9. A form of hydropower that converts the energy obtained from tides into useful forms of power
16. A renewable resource made from things that were once alive.
17. The chemical element of atomic number 92, a gray, dense radioactive metal used as a fuel in nuclear reactors.
18. The gas formed when carbon is burned, or when people or animals breathe out.