The different types of energy are the raw materials that power is generated. They are transformed into secondary forms, such as fuels and electricity. They are then transmitted through various channels in order to provide the power that runs our lives, factories, homes and automobiles. Energy sources can be classified as renewable or non-renewable.

Renewable (or clean energy) is energy that is generated from sources of natural resources that are continually replenished. Examples include solar power, wind power, water power and geothermal energy. Fossil fuels (coal, oil and natural gas) are regarded as non-renewable due to the fact that they form at a much lower rate than what we consume from their resources, which means that they will eventually expire.

Solar energy can be harnessed by one rooftop or in large solar power plants. It can also be converted into photovoltaic solar power, which produces electricity directly. Water can be harnessed to produce hydropower, or it can be utilized for the energy of waves and tides. Geothermal energy is derived from hot water reservoirs underground. Bioenergy is derived from various organic sources, such as woody crops as well as dung from livestock and human wastes.

In addition to being environmentally friendly Renewable energy is also cheaper than fossil fuels. Renewable energy is expensive and requires an extensive infrastructure to capture and distribute the energy. This can result in difficult trade-offs when it comes to environmental as well as economic factors. Yet, the development of these technologies is continuing to increase and they are making strides against more traditional fossil fuels. In the long run renewable energy could be more cost-effective than coal and oil.

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