Answer:
Demand for water is growing in most cities as every urban citizen requires almost double the amount of water that a rural citizen requires. Moreover, India is rapidly urbanizing. Most of our cities were self-sufficient in meeting their water needs from the extensive urban water bodies to supply water to citizens. Today these water bodies have completely disappeared. Municipalities have been stretched to their limits to find water for the grown urban populations. The government as well as the private parties are extracting groundwater. As a social advantage, it is used to reduce the consumption of groundwater; many people around the world are using rain-water harvesting systems. This practice has been around for thousands of years and has been growing at a rapid pace. Till today, rainwater is used as a primary source of drinking water in several rural areas. The best thing about rainwater is that it is free from pollutants as well as salts, minerals, and other natural and man-made contaminants. In areas where there is excess rainfall, the surplus rainwater can be used for recharging ground water through artificial recharge technique. As an economical advantage, rainwater is free from many chemicals found in ground water, which makes it suitable for irrigation, industrial use and watering gardens. In fact, storing large reservoirs of harvested water is a great idea for areas where forest fires and bush fires are common during summer months.
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