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If we consider gases of biological origin, then a number of quite obvious reasons for variability in concentration spring to mind. The presence of large numbers of photosynthesizing organisms will obviously enhance the oxygen concentration in a given area although the oxygen concentration of the atmosphere is so high that this effect will be very slight. On the other hand, at night, when there is no light for photosynthesis, respiratory carbon dioxide from the same organisms will raise the level of this gas in the atmosphere. As carbon dioxide concentrations are relatively low the effect of biological activity on these is quite marked. The air is dense forests can be as high as 340 ppm carbon dioxide at night, compared to daytime levels of as little as 305 ppm. In soil air, where ventilation is obviously restricted, the levels of carbon dioxide can increase from normal levels of 0.03 percent, to reach as high as 0.05 per cent
For this research project I have elaborated an original model to explain the influences atmospheric carbon dioxide exerts in animal and human life span. The main aspects of the model are as follows:
The primary surface earth factor, that causes an increase in atmospheric carbon dioxide, is the rise in both animal and human population inhabiting the world.
Because of the increase in population, atmospheric carbon dioxide increases due to higher fuel combustion, destruction of forest for creating larger urban areas, and increase in the exhalation of carbon dioxide gases from respiration.
Augmentation of carbon dioxide causes warming of the planet, that could reach dangerous levels, unsuitable for life. To reduce atmospheric carbon dioxide, reforestation and increase in plant mass, increase in forests and plant mass must be artificially stimulated by man. This increase in forests and plant mass will produce higher levels of photosynthetic activity that will absorb the excess of carbon dioxide. But IT WILL ALSO GENERATE NEW AND MORE OXYGEN RELEASED INTO THE ATMOSPHERE. THIS OXYGEN COMES TO REPLACE THE CARBON DIOXIDE ABSORBED BY THE PLANT.
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