
Inside Saturn is probably a core of iron, nickel, silicon and oxygen compounds.
Xem thêmDid you know that sea plants produce more than half of the oxygen we breathe every day?
Xem thêmMost people think of forests when they hear the word "oxygen," but the ocean plays an equally important role.
Xem thêmThis process releases oxygen into the water and into the air above.
Xem thêmBlood carries oxygen to every part.
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