Read the source given below and answer the questions that follow:
Given the abundance and renewability of water, it is difficult to imagine that we may suffer from water scarcity. The moment we speak of water shortages; we immediately associate it with regions having low rainfall or those that are drought prone. We instantaneously visualise the deserts of Rajasthan and women balancing many ‘matkas’ (earthen pots) used for collecting and storing water and travelling long distances to get water. True, the availability of water resources varies over space and time, mainly due to the variations in seasonal and annual precipitation, but water scarcity in most cases is caused by over-exploitation, excessive use and unequal access to water among different social groups.
i. Give any one reason that could contribute to water scarcity in the future?
ii. Why a resident of Rajasthan would choose to install a submersible water pump?
iii. Why is water conservation crucial? Discuss any one key for effective water management and conservation.