Environment & Ecology · Environment
PM2.5 refers to environmental particulate matter with which of the following characteristics?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Particles with a baseline concentration of 2.5 micrograms per cubic metre
- 2Particles with an aerodynamic diameter of 2.5 micrometres (μm) or less✓
- 3Particles that remain suspended in air for exactly 2.5 hours
- 4Particles with a radius greater than 2.5 micrometres
Correct answer
Particles with an aerodynamic diameter of 2.5 micrometres (μm) or less
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