alleryWastewater from sources OTHER THAN toilets (kitchen, bath, washing) is called:
ABlack water
BGrey water
CHard water
DBrine
Answer & Solution
Correct answer: B. Grey water
1. GREY WATER: wastewater from bathrooms, kitchens, washing — relatively clean.
2. BLACK WATER: contains human waste from toilets — needs sewage treatment.
3. Grey water can be recycled with simple filtration for gardening and flushing.
_Source: syllabus SST Geography Ch 3 §3.5 Water Reuse_
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