Asked in PPSC, FPSC and other one-paper exams (compiled from unofficial resources).
Environment, Weather & EcologyEcosystem, Biodiversity & Conservation
Which of the following is responsible for the largest amount of oxygen on earth?
- A.Trees and forests
- B.Phytoplankton only
- C.Grasslands
- D.AlgaeCorrect answer
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Practice these MCQs in the appQuick fact: Algae (particularly marine algae and phytoplankton) are responsible for producing the largest amount of oxygen on Earth, contributing an estimated 50–80% of the planet's oxygen.