earth's oxygen comes from phytoplankton

Phytoplankton produce majority of Earth Oxygen

Fun Plant Fact

Most people believe that the earth’s oxygen comes from rainforests. However, that’s far from truth. Phytoplanktons are responsible for producing the majority of Earth’s oxygen. These tiny ocean plants called phytoplankton contribute 50-80% of the oxygen on earth

In fact, the net oxygen produced by the Amazon rainforest is almost zero. Plants don’t just produce oxygen but also consume it for metabolic activities.

Simply put, they do produce oxygen during the day, but they use oxygen at night to burn their food and produce energy that helps them grow and thrive.

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