CUIZ-FACT-316024EE
hard
Environment
✓ Fact-Verified
What is the main source of oxygen on Earth?
Verified Answer
Forests
Quiz Options
- Forests
- Plankton
- Volcanoes
- Deserts
Explanation & Context
Phytoplankton in the oceans produce an estimated 50-85% of the oxygen in the atmosphere through photosynthesis.
Also Asked As / Semantic Queries
"Which is the main source of oxygen on Earth?"
Authoritative Sources & Citations
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