Electric Power: Different Sources Of Electricity
Electricity comes from many sources. Some of the sources, such as fossil fuels, are disappearing because there is such a big demand for them. Scientists are researching new ways of generating electricity, so that if fossil fuels run out, there will be other sources. None of these alternative sources is ideal, but they all have their pros and cons. Here are some of the most popular sources of electricity
Solar energy(energy comes from sun)
Solar energy is the energy that comes from the sun. We capture solar energy through solar panels. This energy produces no pollution; also it doesn’t taint anything. About the equivalent of 22 million barrels of oil of solar energy hits the United States alone per day. This might sound like the perfect energy but it is costly and besides, you can’t be sure that the sun will shine brightly without cloud cover everywhere in the country every day.
Fossil fuels
Fossil fuel is a material that can be burned and that comes from the fossil remains of animals and plants, such as long-dead dinosaurs. Some examples of fossil fuels are coal, natural gas and petroleum. This source is currently available and it is not dependent upon the weather. Some of the problems of fossil fuel use are that it causes pollution, it is a non-renewable resource and it needs to be mined from the earth. In addition, it causes acid precipitation which destroys life in lakes.
Hydroelectric power
Hydroelectric energy is produced when water falls from a high place to a low place. A hydroelectric power station contains a turbine driven by falling water from a dam. The turbine drives the generator. This form of energy produces little pollution; in addition, it does not ruin the water. The water still can be used for other purposes. Hydroelectric power does not cost any more than fossil fuels.
Another advantage is that there are a lot of lakes or rivers where a dam can be built to produce energy. One disadvantage is that fish, such as salmon, can not climb over the dam, so the dam changes the environment. Another disadvantage is that when a dam is built, a huge area is flooded to make a lake, so the water displaces the people and animals living there.
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