What type of pollutants does the WHO Ambient Air Quality Database monitor?
Show answer & explanation
Correct answer: B
Explanation
Correct Answer: PM₁₀ and PM₂.₅
Explanation
The World Health Organization (WHO) Ambient Air Quality Database primarily focuses on tracking particulate matter, specifically PM₁₀ (particles with a diameter of 10 micrometers or less) and PM₂.₅ (particles with a diameter of 2.5 micrometers or less). These pollutants are considered the most significant indicators of air quality and have the most documented impact on human health, contributing to respiratory and cardiovascular diseases.
Key Points
- PM₁₀ and PM₂.₅ are fine inhalable particles that can penetrate deep into the lungs and enter the bloodstream.
- Monitoring these specific sizes helps health organizations and governments assess the burden of disease caused by air pollution and formulate effective mitigation strategies.
- While the WHO database covers these particulates, it also includes information on other pollutants in some regions, but particulate matter remains the core metric for global comparative monitoring.
Additional Facts
- Exposure to PM₂.₅ is particularly dangerous because its smaller size allows it to reach the alveolar region of the lungs more easily than PM₁₀.
- The WHO periodically updates its Air Quality Guidelines to reflect the latest scientific evidence on the risks associated with these specific pollutants.
Important Questions
Question: What is the primary source of fine particulate matter in urban environments?
Answer: The primary sources include vehicle emissions, industrial processes, construction activities, and the burning of fossil fuels or biomass.
Question: Which organization sets the global standards for safe air quality based on this data?
Answer: The World Health Organization (WHO) establishes global air quality guidelines.