that part is located at corn of the earth and earth planet contain 45% oxygen.
our earth planet is also known as a “blue planet” because our planet is covered 70% of water that means above 100% there is 70% part of earth planet is covered with oceans. and 30% part of earth is made up with solid that is also known as “continental crust”. so as per that information we can easily consider that majority part or portion of earth planet is covered with the water.
the earth’s atmosphere extends to a distance of the most of portion of earth is nearest to the earth that means most of portion of 