The Use of Energy
People need all kinds of energy for their survival, the construction of cities, and the establishment of factories. Cooking and heating need energy of heat and lighting needs energy of electricity. It can be concluded without any exaggeration that human being will not be able to survive without energy, nor can the society develop.
The modern world is dependent on fossil fuels—oil, gas, coal and peat. Fossil fuels are used by power stations to generate electricity and to fuel our cars. They are essential to a modern lifestyle, but they have been used at the expense of the environment. And the supply of fossil fuels will also eventually run out.
So people have to use the energy economically and efficiently. More importantly, people will be active to find ways of using the energy from renewable sources such as wind, water power, heat from the ground, nuclear energy, biopower, etc.. It is believed that with the development of science and technology people can find the alternative energy sources.