Greatest problem in the water conservation is to reduce the amount of
A
Ground water
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B
Precipitation
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C
Evaporation
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D
Run-off water
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Solution
The correct option is C Evaporation Evaporation from water reservoirs in hot arid climates causes a loss of 10 vertical feet a year. This water loss can be controlled by the construction of reservoirs with greater water depth and concentration of water into the single reservoir. Also, the wind blowing across the surface of the water reservoir causes additional evaporation. A windbreak helps to conserve water.