What is dam ? Why do we need to build large dams ? While building large dams, which three main problems should particularly be addressed to maintain peace among local people ? Mention them .

Explanation

(a) Dam is a barrier that is built across a river or a stream for storage of water.
(b) Large dam can ensure the storage of adequate water for irrigation and also for generating electricity.
(c) Social problem, economic problem and environmental problem.
Detailed Answer:
A dam is a barrier that stops or restricts the flow of water or underground streams.
A dam is built to control water through placement of a blockage of earth, rock across a stream or river, They usually store water in a reservoir, which is then used for a variety of applications such as irrigation and municipal water supplies.
Three main problems that arise because of the construction of big dams are :
(i) Construction of dams across rivers leads to deforestation, which results in the loss of biodiversity.
(ii) Constructing reservoir may result in the flooding of nearby towns and villages.
(iii) Construction of dams requires a huge amount of monetary investments.
Two ways to bring awareness on "how to save water" are :
(i) By organising a demonstration of the practices in the households on how we can minimize the wastage of water.