Question

from where do we get oxygen we breathe in?​

Answer 1

At least half of Earth's oxygen comes from the ocean.

Scientists estimate that 50-80% of the oxygen production on Earth comes from the ocean. The majority of this production is from oceanic plankton — drifting plants, algae, and some bacteria that can photosynthesize.

Answer 2

Answer:

Most of the oxygen we breathe come from the oceans.

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