what type of energy is coal
Introduction on what type of energy is coal:
The sources of energy, which have accumulated in nature over a period of hundreds of millions years, such that they cannot be replaced when exhausted, are called non-renewable resources. The non-renewable sources of energy are fossil fuels, such as, coal, petroleum and natural gas. They are also known as “Conventional Sources of energy”.
Fossil fuel:
The fossil fuels which are preserved under the Earth’s crust as the remains of plants and animals are called fossil fuels. These fuels were formed in prehistoric times. Following are the main types of Non-renewable resources of energy. [1] Coal, [2] Petroleum [3] Natural gas. These non-renewable sources are available in very limited amount. Their judicious use is very important for the sustainable development. It takes many years to make them but are being consumed at very brisk pace.
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Origin of Non-Renewable Sources of Energy Coal :
It is widely believed, that millions of years ago, due to certain natural calamities, such as earthquakes, cyclones, storms, floods, etc., large number of animals and plants got buried beneath the earth. Under humid conditions and very high pressure and temperature of the earth and the bacterial decomposition in the absence of air, they gradually decomposed to form coal, depending upon the external factors to which they were subjected. It is assumed that the energy supplied by fossil fuels is basically the energy which was supplied by the sun, millions of years ago. These sources of energy are non-renewable because they cannot be renewed over a short period of time. Hence, it is very precious.
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Uses of Non-Renewable Sources of Energy,Coal :
These days coal is extensively used in generating electric energy at the thermal stations or thermal power plants. Such power generating stations are called thermal power houses, because ultimately heat energy is converted into electric energy.