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Answers
Extraction processes can generate air and water pollution, and harm local communities. Transporting fuels from the mine or well can cause air pollution and lead to serious accidents and spills. When the fuels are burned, they emit toxins and global warming emissions.
2. answer
Alternative energy is any energy source that is an alternative to fossil fuel. Thesealternatives are intended to address concerns about fossil fuels, such as its high carbon dioxide emissions, an important factor in global warming.
3. answer
The kinetic energy of wind was traditionally used to do mechanical work like pulling water from a well or lifting. Nowadays, we can generateelectricity using windmills. ... Nowadays, hydroelectric powerstations are built to make use of theenergy of water to generate electricity
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1. The disadvantages of fossil fuels are as follows:
*1 Burning of coal and petroleum produces a lot of pollutants causing air pollution.
*2 Fossil fuels release oxides of carbon, nitrogen, sulfur, etc. that cause acid rain, which affects the soil fertility and potable water.
*3 Burning of fossil fuels produce gases such as carbon dioxide that causes global warming.
2. Fossil fuels, which have been traditionally used by human beings as an energy sources, are non-renewable sources of energy. These sources of energy are limited and cannot replenish on their own. They are being consumed at a large rate. If this rate of consumption continues, then the fossil fuels would be exhausted from the Earth. Therefore, we have to conserve the energy sources. Hence, we should look for alternate sources of energy.
3. Traditionally, waterfalls were used as a source of potential energy which was converted to electricity with the help of turbines. Since waterfalls are few in number, water dams have been constructed in large numbers. Nowadays, hydro-dams are used in order to harness potential energy of stored water. In water dams, water falls from a height on the turbine, which produces electricity.
Earlier, the windmills were used to harness wind energy to do mechanical work such as lifting/drawing water from a well. Today, windmills are used to generate electricity. In windmills, the kinetic energy of wind is harnessed and converted into electricity. The rotatory motion of the blades turns the turbine of the electric generator to generate electricity.