Air pressure is 760 mm Hg, and its density works out to be 1 gram per liter at sea level, where its viscosity is 50 times greater than water's. These values might appear irrelevant, but are actually vital for human life because, as Michael Denton puts it, "The overall composition and general character of the atmosphere-its density, viscosity, and pressure, etc.-must be very similar to what it is, particularly for air-breathing organisms." (James J. Lovelock, Gaia, Oxford: Oxford University Press, 1987, p.71.)
When we breathe, our lungs use up energy in order to pump the air in and out. Like all forms of matter, air is resistant to movement. But thanks to the properties of the gaseous atmosphere, this resistance is very weak, making it easy for our lungs to inhale and exhale. If that resistance were stronger, our lungs would begin to struggle. You can easily grasp this with an experiment: It's easy to draw water into a syringe, but harder to draw honey, because honey has a higher density and lesser fluidity.
If the atmosphere's values of
density, fluidity, and pressure were altered by even a fraction, inhaling would
become as hard as drawing honey into a syringe. One could argue that the
syringe's needle could be made wider, in other words, the lung's airways could
be enlarged. But if we did that in the case of the capillaries in the lungs, the
result would be to reduce the size of the area in contact with air, with the
result that less oxygen and carbon dioxide would be exchanged in the same amount
of time and the respiratory needs of the body would not be satisfied. The air we
breathe in has the absolutely right density, fluidity and pressure and fits the
bill just fine. On this subject, Professor Michael Denton states the
It is clear that if either the
viscosity or the density of air were much greater, the airway resistance would
be prohibitive and no conceivable redesign of the respiratory system would be
capable of delivering sufficient oxygen to a metabolically active air-breathing
organism... By plotting all possible atmospheric pressures against all possible
oxygen contents, it becomes clear that there is only one unique tiny area...
where all the various conditions for life are satisfied... It is surely of
enormous significance that several essential conditions are satisfied in this
one tiny region in the space of all possible atmospheres. (Michael Denton,
Nature's Destiny, The New York: The Free Press, 1998, p. 127.)
None of these possibilities occur, however, because God has created the world, the solar system, and the whole universe flawlessly. He has created the whole of the Earth in order to provide us with suitable living conditions.
Article courtesy of www.DesignandUniverse.com
[Quran 51:48] And we made the earth habitable; a perfect design.
[Quran 2:22] The One who made the earth habitable for you, and the sky a structure. He sends down from the sky water, to produce all kinds of fruits for your sustenance. You shall not set up idols to rival GOD, now that you know.
[Quran 6:125] Whomever GOD wills to guide, He renders his chest wide open to Submission. And whomever He wills to send astray, He renders his chest intolerant and straitened, like one who climbs towards the sky.* GOD thus places a curse upon those who refuse to believe.
We now know that the proportion of oxygen diminishes as we go higher in altitude ("climb towards the sky"), and we gasp for air.