O Level Biology MCQ PDF - Topics
Pollution Causes MCQ Quiz Online
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MCQs on Pollution Causes Quiz
MCQ: Non-toxic, unreactive chemicals used as cooling agents in refrigerators are known as
MCQ: Risks of skin cancer is increased if
MCQ: Upon entering through stomata, the leaves get damaged and plant dies. This pollutant is
MCQ: Volcanic eruptions, biological decay and forest fires releases
MCQ: Increased melting of ice glaciers may be a result of
