While the rainforest plays a role in oxygen production, much of the oxygen is reabsorbed by decay and respiration. Rainforests, especially the Amazon, are often called the “lungs of the Earth” because they produce large amounts of oxygen through photosynthesis. Trees and plants take in carbon dioxide and release oxygen as they grow. However, the story doesn’t end there.
The same trees, along with fungi, animals, and microbes, consume oxygen through respiration. When plants and fallen leaves decay, decomposers like bacteria and fungi break them down, using up much of the originally produced oxygen. This cycle keeps oxygen levels balanced within the rainforest itself.
Most of the oxygen we breathe actually comes from the oceans, where microscopic organisms called phytoplankton release vast amounts of oxygen through photosynthesis. These tiny life forms produce more than half of Earth’s oxygen supply.
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