Egypt's Air Quality Limit Values
Air is the most important thing in our life. Air is a group of gases make up the Earth 's atmosphere, air takes the planet to 880 km altitude, the atmosphere is what makes life possible for humans, animals and plants. And the atmosphere near the Earth 's surface which adjoin her as a thin skin is air you get some air. And breathe a must for animal and plant biology in General.
Air consists of 78% of nitrogen gas (nitrogen), and 21% of oxygen gas, and some rare gases (sleeplessness, ozone, carbon dioxide, etc.). Air surrounding the Earth represents a barrier around the Earth prevents large amounts of sunlight and burn everything, for example the harmful rays of the Sun as ultraviolet rays and not the little ones leaked in sufficient quantity
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If you live or visit the capital city Cairo, so, sure you see the black smog. The main source of air pollution in Egypt come from cars, especially old cars. Also, the factories did not follow the standard. Government also it is not series about this problem. So, the country faces a disaster.
Air Quality Limit values are given in the Executive Regulations of the Environmental Law no. 4 of Egypt (1994). These Air Quality Limit values are presented in Table 1.
Table 1: Ambient Air Quality Limit values as given by Law no.4 for Egypt (1994) compared to the World Health Organization (WHO) air quality guideline values.
Pollutant Averaging Maximum Limit Value time WHO Egypt
Sulphur Dioxide (SO2) 1 hour 500 (10 min) 350 24 hours 125 150 Year 50 60
Nitrogen Dioxide (NO2) 1 hour 200 400 24 hours - 150 Year 40-50
Ozone (O3) 1 hour 150-200 200 8 hours 120
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