How does the air we breathe differ from the air in the air around us?
The air we breathe has the same constituents as the air around us; i.e. 78 percent nitrogen, 21 percent oxygen and 1 percent other gases. These are just approx values. We need oxygen to survive, so our body uses oxygen and expels the others.
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The air we breathe typically refers to the air that enters our respiratory system during inhalation. It contains a mixture of gases, primarily nitrogen, oxygen, carbon dioxide, and trace amounts of other gases. The composition of the air we breathe can vary depending on factors such as location, altitude, and proximity to sources of pollution.
On the other hand, the air around us refers to the overall atmospheric composition in our immediate environment. While it includes the same gases found in the air we breathe, the concentrations may differ. Additionally, the air around us may contain pollutants, particulate matter, and other substances that can affect air quality and health.
In summary, while the air we breathe and the air around us share similar compositions, the specific concentrations of gases and presence of pollutants may vary between the two.
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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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