None of the Earth's oxygen is polluted. Oxygen is an element and, if it is present, is in its pure form. Areas of the Earth's atmosphere (a mixture of about 21% oxygen, 78% nitrogen and 1% argon along with traces f other gases) may contain local concentrations of pollutants.)
The approximate percentage by volume of oxygen in Earth's atmosphere at location 2 is around 21%.
The Earth's atmosphere is composed of about 21% oxygen. This level is important for supporting life on our planet.
The approximate percentage of oxygen in Earth's lower atmosphere is around 21% by volume.
oxygen
Oxygen is consumed and polluted by burning of cigarettes.
Nitrogen and oxygen make up about 99% of the Earth's atmosphere. Nitrogen accounts for about 78% and oxygen for about 21%.
If you breath in polluted air it will
Earth contains 21 percent of oxygen in the atmosphere!coz earth contains only hot gases and oxygen is not a hot gas!:D
About 40%
Earths atmosphere is rich in Oxygen, some 21% of the air is Oxygen. There is oxygen on other planets, but the percentage comes nowhere close to this. The percentage of Oxygen in earths atmosphere is thought to have been much higher in the past, before animals were about, but after the arrival of plants.
decrease
Decrease