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~Air
Pollution~
-Introduction
-Pollutants
~Sulphur
dioxide
~Nitrogen
dioxide
~Carbon
monoxide
~Ozone
~Particulates
~Lead
-API
~What's
API?
~In
Hong Kong
~Equipment
~API figures
-Photochemical
Smog
~What
is it?
~Problems
~Effects
-Acid Rain
~How
it is formed?
~Effects
-Global warming
~Greenhouse
effect
~Effects
~What
can you do?
-Measures
~Part
1
~Part
2
~Part
3
~What
can you do../1
~What
can you do../2
|
 API
figures
The API represents a standard expression
of composite variations in air quality and its value ranges from between
0-500. The following are the possible health effects for different
ranges of API figures:-
| API |
Air
Quality |
Health
Implications |
| 0-50 |
Good |
No
short or long term health effects |
| 51-100 |
Moderate |
Immediate
health effects are not expected but chronic effects may be observed
if you are exposed to such levels persistently for a long time. |
| 100-200 |
Unhealthy |
People
who have breathing or heart problems will notice mild aggravation
of their health conditions. Generally healthy individuals may
also notice some discomfort. |
| 201-500 |
Very
Unhealthy |
People
who have breathing or heart problems will experience significant
aggravation of their symptoms and there will also be widespread
symptoms in the healthy population. These will include eye irritation,
wheezing, coughing, phlegm and sore throats. |
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