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