When dam was building, it can have negative effects and positive effects. In the first place, dam has impact on the environment and destruction of ecosystems. For example, the forest has been destroyed as for the construction of the dam. Because the construction of the dam will need to use many areas, may be caused by deforestation. Next, a dam may affect the animal homeless and extinct. Because of changes in ecosystems in many ways are make there was a problem for wildlife. And finally, the destruction of food source for wildlife result in change to lives of animal. May be that animals have to find food in the fields of the villagers, who may cause damage.
However, the dam don’t have negative only but also have positive effect in a way, which results in benefits of various aspects. For example, it can produce electrical energy from hydro power for use in a small community, and does not cause pollution to the environment. Next, as a new tourist attraction and recreational activities. For example, sailing and fishing. And encourage new career to the villagers such as agriculture and fisheries careers. As a result, the villagers have increased revenue. And finally, a dam used to store water for use in agriculture because main occupation of the villagers. And consumption during water shortages, as a workaround for the flood. The construction of the dam cause negative effects and positive effects, depending on the view each of them that the dam will benefit you how much?(254)