According to the lecture, the speaker told the disadvantages of a hydropower. He said that there are enormous drawbacks of a hydropower despite of the benefits of it. He gave three details to support his negative viewpoint to a hydropwer.
To begin with, he started his specific ideas by saying that the dams are forcing to the resistents of the regions, which the dams are supposed to be built in that regions. The dams are built greatly in the aspect of their scales. Therefore, the dams are able to make a lot of communities move to other regions. As the result of that, many people have to give up their own jobs and sell their jobs unavoidably.
Second, he suggested the contamination of the dams. The amount of the water in the dams is greatly huge, so the flow of the water is not very active. Consequently, various toxic substances are accumulated over the time. Then these materials are dangerous to the neighbor animals and plants, even the people.
Lastly, the dams are able to change the nature. As the water of rivers are being dried up, due to the construction of the dams, many environmental changes occure. And this phenomenon can evne influence the climate of a nation.
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