CES - Certified Environmental Scientist

What is PM2.5 and why is it a significant health concern?

Particulate matter with diameter less than 2.5 micrometers that can penetrate deep into the lungs and enter the bloodstream Particles exactly 2.5 millimeters in diameter A type of chemical pollutant in water A measurement of noise pollution

Correct Answer:

Particulate matter with diameter less than 2.5 micrometers that can penetrate deep into the lungs and enter the bloodstream

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