Which one of the following cities became the first urban center in India to make rainwater harvesting mandatory for all buildings?
Correct Option is (b).
Chennai became the first Indian city to make rainwater harvesting compulsory for all buildings. This initiative improved groundwater recharge, reduced water scarcity and set an example for sustainable water management in other Indian cities.
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To combat acute water scarcity, Chennai was the first city in India to make rooftop rainwater harvesting mandatory for every household and building. The policy led to significant groundwater recharge and improved water availability. This successful model inspired several other states to adopt similar conservation measures for ensuring sustainable urban water use. Correct Option is (b).