O Level Biology MCQs – Certification Test 841

Atmospheric Pollution Trivia (Question 841) – App & e-Book Download

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MCQ 841: Nitrates (NO₃^-1) and phosphates (PO₄^-3) reach underground water with:

acid rains
fertilizers washed away by rain water
decomposition of organic compounds by anaerobic bacteria
decomposition of organic compounds by aerobic bacteria

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