Which one is not a source of PM 2.5?, Vehicle exhaust, Steam, Coal-fired, , Geography questions and answers, Study Online for free, egpage.com

A:	Vehicle exhaust
B:	Steam
C:	Coal-fired
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The correct answer is:

✅ Steam

PM2.5 refers to airborne particles ≤2.5 micrometers in diameter, harmful to health.

Steam is water vapor (H₂O gas), not a particle pollutant.

Vehicle exhaust: Soot, unburned fuel, and tire wear.

Coal-fired plants: Ash, sulfates, and nitrates.

Other sources: Wildfires, dust, industrial emissions.

Fun Fact: PM2.5 can penetrate deep into lungs and even enter the bloodstream! 💨⚠️

Bonus: Steam from cooling towers is often mistaken for pollution—it’s just clean water vapor! 🌫️💧

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