Environmentalmedium · Past Paper
In the context of air quality, what does 'PM2.5' refer to?
AParticulate matter with diameter less than 2.5 micrometers
BPressure measured at 2.5 atmospheres
CPollution level in 2.5 square kilometers
DPercentage of methane being 2.5%
✓ Correct Answer: A — Particulate matter with diameter less than 2.5 micrometers
PM2.5 particles are small enough to enter deep into the lungs and even the bloodstream, posing significant health risks.
Share this question
More from Environmental
- The destruction of the ozone layer is most intense over which region?
- What is the result of 'thermal pollution' on the metabolic rate of aquatic organisms?
- Deforestation leads to an increase in which gas?
- Which soil conservation method involves building steps on hillsides?
- Which of the following gases is NOT a greenhouse gas?