Due to construction of large dams
1) the nearby flora and fauna is destroyed and they become homeless
2)the villagers whose home is the village in which they live are vacated with the promise of riches and they lose their jbo which they werfe doing well in the village and after coming to the city they become homelss or jobless or they may have do extra work to survive in the cit and the future of their kids will be lost by going to do job