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Approximately what percent of the oxygen on Earth is produced through
photosynthesis?

User Datt
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Like all plants, they photosynthesize – that is, they use sunlight and carbon dioxide to make food. A byproduct of photosynthesis is oxygen. Scientists believe that phytoplankton contribute between 50 to 85 percent of the oxygen in Earth's atmosphere.
User Arsibalt
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Answer:

50-85%

Step-by-step explanation:

User Ethan
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