Question

building of big dams gives rise to some problems list two main problems that may arise suggest a solution to anyone of these problems

Answer 1

by building dams the place where the people live near it must want to vacate the place. so the people can lose their shelter. and the place where the dam constructd nead a more place. so the people loss their land the main property for the people.......and environmental problems like deforestation and soil erosion may cause.....

Answer 2

environmental problems-- deforestation
 economic problems--huge sum of money is required

solution
1.to compensate deforestation we should grow more trees