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O Level Biology MCQs – Certification Test 692

Atmospheric Pollution Quiz (Question 692) – Learning App & e-Book Download

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MCQ: 692

Sulfur dioxide (SO2) may be reduced in air, if

  1. catalytic converters are used in cars
  2. car pools are used
  3. filters or scrubbers are used in chimneys
  4. ozone friendly products are introduced

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