the oxygen level decreases
Because due to the over pollution and cutting down the tree's level of Oxygen is decreasing .The level of Nitrogen always remains constant in the atmosphere . The level of Nitrogen doesn't' depend on the level of the Oxygen level.
The oxygen level remains about the same, but the density of the air is reduced.
Hypoxia
There is no third energy level of oxygen, there is only two. The second energy level has 6 electrons.
1 meter = 3.28084 feet (rounded) 25,000 feet = (25000/3.28084) meters = (25/3.28084) kilometers = 7.62 kilometers (rounded)
250 feet by 100 feet is 25000 square feet.
About 6/10ths of an acre.
25000
25,000 US gallons = ~3,342 cubic feet.
Acre is a measure of area. If you have a piece of land that is 25000 feet squared, that is a little over a half an acre.
About 3/5 of an acre.
Multiply square feet by 0.092903 to get square meters.
25,000 square feet = 2,323 square meters.
25,000 m2 equates to 269,097.76 square feet.
1:25,000 which is read 1 to 25,000. Note that 1 in would be 25000 inches or 1 foot would be 25000 feet and so on.
the aircontains 20.93% oxygen-whether you are swimming in the Dead Sea in Israel (1,369 feet or 417 meters below sea level) or standing on top of Mount Everest in Nepal (29,035 feet or 8,850 meters above sea level). the barometric pressure is lower the higher in altitude you go so the pressure of oxygen is lower therefore its harder for your lungs to absorb the oxygen.