As we saw earlier, hydroelectric power plants make use of the force of flowing water to generate electricity. There are many reasons why experts hold that hydroelectricity is more acceptable than the other. One of the most significant advantages is that hydroelectric power plants do not require any fuel for power production. They only need water, a renewable source of energy. Thermal power stations need fossil fuels like coal, natural gas, oil etc., to function.
Since no fuel is required, the cost of electricity produced by hydroelectric plants is also somewhat constant. In the case of other kinds of plants, it depends on the cost of fuels in the international market.
Another important factor is pollution. Hydroelectric power plants do not burn fuel; hence do not cause pollution either. The heated water that comes out of them threatens aquatic lives too.
Hydroelectric plants also have longer lives compared to thermal plants. Besides these, hydroelectric plants are known to facilitate irrigation of farms and preventing floods.
Hence, around 150 countries in the world use this technology for power generation.