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Despite what law enforcement officers say, scientific research indicates breath tests are not as accurate or as dependable as claimed. Because they depend on the amount of alcohol in the air sacs of the lungs, variations in breathing can affect the results. For instance, deep breaths will capture air from deep in the lungs where the concentration of alcohol is greater. Likewise, short, quick breaths will capture less air from deep in the lungs, providing air less affected by the concentration of alcohol in the blood.

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14y ago

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