Plants and trees
oxygen mostly comes from our trees & plants
No. Wind or not, oxygen is a major component of air. Earth's plants produce most of its oxygen.
no the oxygen from the ocean comes from two things algae and plants create oxygen through photosynthisis and water is made mostly of oxygen and a bit of hydrogen
nitrogen and oxygen
oxygen
photosynthesis
They come from plants. It is a cycle. (Carbon Dioxide and Oxygen Cycle) When you breathe out you realse Carbon Dioxide and the plants sucks it in and relase oxygen and that is what we breathe in.
in the air :0
No. Earth's atmosphere most likely originate from volcanic atmosphere. The oxygen is produced by plants.
air water trees
The air
oxygen
From the atmosphere (air) surrounding the wood. The wood would not burn in a vacuum devoid of air. Air is composed of approximately 20% oxygen.
21% of air is pure oxygen
As the third most abundant element, oxygen in the air is made by plants and algae.
from the air around the airship.
When oxygen is reacting with iron it generally comes from the air, but it can also come from oxygen disolved into water. There are other ways it can occur but I do not know these. But unless it is in a vacuum, the oxygen comes from the surrounding environment like air or water.