Q. The term “Day Zero”, recently seen in the news, refers to:

[A] The day when global freshwater resources are completely exhausted

[B] The declaration of a national water emergency by the United Nations

[C] The point at which a city’s usable water supply falls below a critical threshold, forcing shutdown of regular tap water supply

[D] The stage when groundwater recharge exceeds water extraction

Answer: C
Notes:

Explanation: “Day Zero” refers to the situation when a city or region’s usable water reserves fall below a critical level, compelling authorities to stop normal tap water supply and rely on rationed emergency distribution points. The term has gained prominence due to concerns over climate change, groundwater depletion, and weak water governance.

Source- IT

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