Advantages of dams are numerous, that is the reason so much money and work goes into building and maintaining them. Some of the advantages are:\tElectricity is produced at the\xa0constant rate with the help of hydroelectricity or hydroelectric power.\tIf there is no need for electricity, then the sluice gates can also be closed or stopping the generation of electricity. Water can also be saved for the use of another time as and when the demand for electricity is high hence the usage of water remains judicious.\tDams are so designed by well-qualified engineers to span many of the decades and also can contribute to the generation of electricity for about many years or even decades to come.\tThe lake or reservoir which\xa0forms behind the dam can also be used for the irrigation purpose, water sports or even as other forms of pleasurable activities.Few large dams such as the\xa0Bhakra Nangal dam present in India is the tourist attractions.\tThe buildup of water inside lake means that the energy can also be stored when needed and also when water is released for producing the electricity.\tWhen used, the produced electricity by the dams does not even produce the greenhouse gases and also hence they do not\xa0pollute the atmosphere.\tSome of the disadvantages are:\t\t\tDams tend to be extremely expensive to build and when a decision is taken to build one anyway, it must adhere to a very high standard.And other point to be kept in mind is that since the cost is so high for dam construction, it goes to mean that they must operate for many decades to become profitable enough.You must have heard of the rare flooding related to big dams. But this flooding of large areas of land means that the natural environment is destroyed.Relocation is another big concern. People living in villages and towns that are in the valley that could be flooded, must move out. Hence, they lose their farms and businesses. In some countries, people are forcibly removed so that hydro-power plant constructions can go ahead. This happens to be an ethical concern.The building of large dams can cause serious geological damage, for instance, the building of the Hoover Dam in the USA triggered a number of earth quakes and has depressed the earth’s surface at its location. This is an alarming matter.Although modern planning and design of dams has reduced the possibility of certain disasters occurring.\t\t