Q1. Which of the following is the first state in India that made rainwater harvesting structures compulsory for all houses?
Explanation
Tamil Nadu is credited as the first Indian state to make rainwater harvesting structures compulsory for houses, especially through its early 2000s municipal and state-level measures. The rule was meant to recharge groundwater and reduce urban water stress. Rajasthan faces severe water scarcity, but it was not the first state to impose this house-level compulsory requirement. Gujarat has important water-conservation programmes, yet this specific first-state distinction is not attached to it. Odisha also has rainwater and watershed initiatives, but not the pioneering compulsory-household rule asked here.
