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Dictionary


am'bient air' stand"ard




the highest concentration of a specific air pollutant at a particular outdoor location, in a specified unit of time, that is not considered hazardous to humans: The ambient air standard for gas X is 3 parts per million per hour.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

ambientambiente

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