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空氣污染指數.....急!!

請問空氣污染指數係講D咩架??(What does air pollution index tell us?)我急需呢D資料呀..如果可以既話我想要英文既資料...THX!!

1 Answer

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  • DANZAS
    Lv 7
    1 decade ago
    Favorite Answer

    The Air Pollution Index is to let you know about the quality of the air at the moment.

    The API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Those pollutants are nitrogen dioxide, sulphur dioxide, ozone, carbon monoxide and respirable suspended particulates. APIs for each of these five pollutants are calculated and the highest API number is reported as the API of that hour.

    API and Air Quality

    The API ranges from 0 to 500 and is divided into 5 bands according to the potential effects on health. The potential health effects for different ranges of API values are as follows.

    Air Pollution Index

    Air Pollution Level

    Health Implications

    0 - 25

    Low

    None expected.

    26 - 50

    Medium

    None expected for the general population.

    51 - 100

    High

    Very few people, if any, may notice immediate health effects. Long-term effects may, however, be observed if you are exposed to such levels for a long time.

    101 - 200

    Very High

    People with existing heart or respiratory illnesses will notice mild aggravation of their health conditions. Generally healthy individuals may also notice some discomfort.

    201 - 500

    Severe

    People with existing heart or respiratory illnesses will experience significant aggravation of their symptoms and there will be also widespread symptoms in the healthy population. These include eye irritation, wheezing, coughing, phlegm and sore throat.

    Points to Note

    The suggested precautionary actions are summarised below.

    Air Pollution Index

    Air Pollution Level

    Precautions

    0 - 25

    Low

    No response action is required.

    26 - 50

    Medium

    No response action is required.

    51 - 100

    High

    No immediate response action is suggested - long-term effects may, however, be observed if exposed at this level persistently for months or years.

    101 - 200

    Very High

    Persons with existing heart or respiratory illnesses (such as coronary heart and cardiovascular diseases, asthma, chronic bronchitis and chronic obstructive airways diseases) are advised to reduce physical exertion and outdoor activities.

    201 - 500

    Severe

    The general public are advised to reduce physical exertion and outdoor activities.

    As the health effects on individuals may vary, you should seek advice from a medical doctor if you are in doubt or feel uncomfortable.

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