Discuss the advantages and disadvantages of rooftop Rainwater Harvesting System.
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Advantages
(i) The rainwater collected on rooftops is used to improve the vegetation cover on ground.
(ii) With the growth of vegetation, the water seeps into the ground and replenishes the ground water supply.
(iii) There is no run-off by muddy or dirty water into the drains.
Disadvantages
(i) People may use the stored water for washing, sanitation or for industrial purpose. It may flow into the drains, instead of soaking into the ground and will not promote groundwater replenishment.
(ii) If scientific measures are not adopted for using rainwater for drinking, it may cause harm to the people’s health than tap water.