Renewable energy
Definition
Renewable energy is energy that comes from sources that are naturally replenished over time, unlike finite fossil fuels. This means that we can use renewable energy without worrying about running out of it. Some of the most common sources of renewable energy include:
Solar energy:
Solar energy is the energy of the sun, and it can be harnessed using solar panels to generate electricity. Solar panels are made up of photovoltaic cells, which convert sunlight into electricity.
Wind energy:
Wind energy is the energy of the wind, and it can be harnessed using wind turbines to generate electricity. Wind turbines are large, tower-like structures with blades that rotate in the wind. The blades turn a shaft that is connected to a generator, which produces electricity.
Hydropower:
Hydropower is the energy of moving water, and it can be harnessed using dams to generate electricity. Dams create a reservoir of water that flows through turbines, which produce electricity.
Geothermal energy:
Geothermal energy is the heat from the Earth's interior, and it can be used to generate electricity or to heat buildings. Geothermal power plants use wells to tap into the hot water or steam under the Earth's surface.