How does chlorine enter the oceans?
Every single plant in the wnyorld needs oxegyn if a plant didnt have oxegyn in would die.
Volcanoes
density currents.
Volcanoes
Lungs.
Mars does have oxegyn actually, although it's really little because of the interaction between the CO2 in it's atmospere interacting with the sun. Btw people, please stop saying Mars has no oxegyn!
placer deposits
No, there are no gases on the moon as there is no atmosphere.
oxegyn in the air
A gas tank
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