Energy Sources

Which energy source is the best?

Hydroelectric power

What is Hydroelectric Power? Hydroelectric power, or hydroelectricity, is generated by the force of falling water.

How does it work? The water is held behind a dam, forming an artificial lake, or reservoir. The force of the water being released from the reservoir through the dam spins the blades of a giant turbine. The turbine is connected to the generator that makes electricity as it spins. After passing through the turbine, the water flows back into the river on the other side of the dam.

Advantages: It can turn off if energy is not needed, it’s built to last for decades, and it causes no pollution.

Disadvantages: It is expensive to build, sometimes causes flooding hazards, and doesn’t work during drought.

Nuclear Power

Advantages: It’s reliable, it creates no air pollution, doesn’t produce greenhouse gas, a powerful source of energy, has the best safety record, causes no global warming, and it only releases steam.

Disadvantage: Rare form of energy and it is expensive to produce.

Geothermal Energy

Advantages: it heats homes buildings, and water, it is used to dry food, and it’s renewable.

Disadvantages: it’s not available in many locations and it has not much power per vent.


Advantages: it’s created naturally, great alternative for fossil fuels, a reliable resource, and a result of plants and photsynthesis.

Disadvantages: it causes global warming, air pollution, acid rain, and droughts.


Advantages: it is used for many things (EX: plastic, gasoline), and it has the easiest ways to burn and use as electricity.

Disadvantages: it causes oil spills, pollution, it poisons streams and rivers, and causes global warming.

Natural Gas

Advantages: it’s the cleanest fossil fuel, it (should) last for 100 years, and it only leaks water vapor and carbon dioxide, (plants need that.)

Disadvantages: it is explosive, it has a part in the “greenhouse effect”, and it only releases carbon dioxide when burned (explodes when burned).

Coal Energy

Advantages: it is very cheap, reliable, and there is still plenty of it left on earth.

Disadvantages: it causes global warming, it’s non-renewable, pollutes Earth, damages the envirement, and is expensive to transport.

Wind Energy

Advantages: it causes no pollution, it is free to use, it’s inexhaustible, and it’s a clean source.

Disadvantages: it is expensive to build and only works efficiently in windy areas.

Solar Energy

Advantages: it is clean(causes no pollution), free to use, inexhaustible, works anywhere, and has a wide array of uses.

Disadvantages: it is expensive to build, only works when the sun is out, and looks bad.


The most commonly used type of energy in the United States is oil. I believe that we should use __________ energy because ____________.