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Mostly due to the fact that plankton produce much of the world's oxygen.

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14y ago
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13y ago

Because they produce about half of the oxygen we breathe, and they are at the bottom of the ocean food chain.

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8y ago

they just are because the world isn't perfect

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11y ago

It is both

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Q: Why are phytoplankton and bacteria important to life on earth?
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