The gas contents of inhaled air and exhaled air are different because inhaled air is oxygen while exhaled air is carbon dioxide.
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During the respiration of plants, animals, and organisms that bring about decomposition, carbon dioxide is returned to the atmosphere. The combustion of fossil fuels (e.g. coal and peat) also releases carbon dioxide into the atmosphere.
Answer: I would pick D ......... hope this is right
Explanation:
Answer:
C
Explanation:
Sewage systems can be regulated and controlled. Because water intake is the largest cause of disease (through water contamination) which is highly affected by the sewer systems.