Ambient Air – Appendix 3
Developing Ambient Air Quality Objectives For Canada
Previous - Contents - Next(Bates et al., 200310)
| Pollutant | Definite Effect | Probable Effect | Possible Effect |
|---|---|---|---|
|
Fine
particles
(PM10,
PM2.5)
|
Time-series and cohort association with daily respiratory and cardiac mortality Aggravation of asthma Increased hospital admissions for respiratory and cardiac conditions Depressed lung function in schoolchildren (acute & chronic)Increased prevalence of bronchitis Increased risk of lung cancer Increased school absences Increase in banded neutrophils |
Aggravation of acute respiratory infections Increased risk of wheezy bronchitis in infants 4-12 monthsDecreased rate of lung growth in childrenIncreased exhaled NO Tachycardia in the elderly Reduced heart rate variabilityIncreased c-reactive protein Increased blood vessel constriction |
Decreased birth weight Increased blood fibrinogen Increased asthma prevalence |
| Ozone |
Increased hospital admissions for acute respiratory diseases Aggravation of asthma Increased bronchial responsiveness Increased response to sulphur dioxide (SO2) |
Effect on mortality Increased sensitivity to allergens |
Aggravation of acute respiratory infections Chronic bronchiolitis with repetitive exposure |
| Pollutant |
Definite Effect
|
Probable Effect
|
Possible Effect
|
| Ozone |
Increased reduced activity days Increased school absences for respiratory illness Reduced lung function |
Increased prevalence of asthma |
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