Energy

3. The ability to store energy for later use, typically through the use of batteries and other technologies.
4. Energy derived from the heat of the earth's interior, typically through the use of geothermal power plants.
9. The ratio of useful output energy to input energy in a system or process.
11. A fossil fuel used for generating energy through combustion and other processes.
14. A fossil fuel used for generating energy through combustion and other processes.
17. A fuel derived from organic matter, typically used in transportation and other applications.

1. Energy derived from the movement of ocean tides, typically through the use of tidal power plants.
2. Energy derived from the motion of ocean waves, typically through the use of wave energy converters.
4. The interconnected network of power lines and other infrastructure used for transmitting and distributing electricity.
5. Energy derived from moving water, typically through the use of hydroelectric power plants.
6. Energy that is derived from sources that are replenished naturally and sustainably, such as solar, wind, and hydro.
7. Energy derived from the motion of the wind, typically through the use of wind turbines.
8. Energy derived from organic matter, typically through the use of biofuels and biopower.
10. Energy derived from the nuclear reactions of atoms, typically through the use of nuclear power plants.
12. A measure of the amount of carbon dioxide and other greenhouse gases emitted by a particular energy source or activity.
13. A fossil fuel used for generating energy through combustion.
15. Energy derived from the sun's rays, typically through the use of solar panels.
16. Energy derived from the fusion of atomic nuclei, typically through the use of experimental fusion reactors.