| A | B |
|---|
| fossil fuel | an energy resource formed from the decayed remains of ancient plants and other organisms |
| pollution | harmful waste products, chemicals and substances in the environment |
| nonrenewable resource | cannot be replaced by natural processes in less than about 100 years |
| renewable resource | energy resources that can be recycled or replacec by natural processes in less than about 100 years |
| acid rain | produced when gases released by burning oil and coal mix with water in the air to |
| solar energy | renewable energy from the sun |
| heliostat array | circular array of curved mirrors used at a solar power plant |
| hydroelectric power | power produced by using water |
| geothermal energy | energy from heated magma within the earth |
| nuclear energy | produced by splitting the nuclei of certain elements |
| uranium | most commonly used fuel in power plants |
| fission | splitting of the nuclei of atoms; energy is released |
