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Not many people know these animals because they live in the deep ocean, so people do not see them usually.

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It is the mammals, and that is the same image of fish. It has 2 fins and a tail. It is as long as 3 school buses, and they are as heavy as the 25 elephants.

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That you can see, the blue whale has a lot of things on earth, from plants to humans. Making the bad thing on earth go down. After all, we need to protect the blue whale from danger.

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The populations of blue whales go down very fast, so we need to protect them from extinction.

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Blue whales are important in the ecosystem, for example, in the sea, there is a little iron but the waste of blue whales has very much iron, so the plants can grow with that iron. To be more specific, the plants are the food of the small animals, and the small animals are the food of the other big animals.

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Do you know, what are the animals help the plants in the grow, help people develop with the perfume? If you think the blue whale, you are right. The blue whale is a useful animal, that lives in the ocean.

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Next, Blue whales help carbon dioxide in the world go down. For instance, the blue whales absorb carbon dioxide, so carbon dioxide will go down. Obviously, the blue whale helps plankton to increase the number. And the plankton also absorbs CO2.