alleryWhy must groundwater be kept free of pollution?
ACleaning rain makes it worse
BIt may take years to renew itself
CIt would change the sky colour
DPollution makes aquifers bigger
Answer & Solution
Correct answer: B. It may take years to renew itself
1. People depend on groundwater as fresh drinking water.
2. Natural regeneration of contaminated groundwater can take years.
3. Pollution does not enlarge aquifers or change the sky.
_Source: Wikipedia, Water conservation, Strategies_
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