The Earth
no
Earth
phytoplankton :)
Oxygen composes of twenty-one percent of Earth's Atmosphere.
Oxygen.
Oxygen
Earth
oxygen
Earth.
The Earth's grass produce 20 to 30 percent oxygen. The other 70 to 80 percent of oxygen is produced by marine plants.
Earth's atmosphere is 20 percent oxygen and 80 percent nitrogen. In space, there is no oxygen due to the lack of gravity to help it form.