The presence of pollutants in the environment is usually expressed in ppm, where ppm stands for ____

Q. The presence of pollutants in the environment is usually expressed in ppm, where ppm stands for ____:
Answer: Parts per million
Notes: PPM is an abbreviation of Parts Per Million. It is commonly used as a measure of small levels of pollutants in air, water, body fluids, etc. Parts per million is the mass ratio between the pollutant component and the solution.

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