Effects of Photochemical Smog and Composition of Atmosphere

Effect of photochemical smog

The effects of photochemical smog are given below-
• both ozone and PAN cause irritation of eyes creating lachrymation and affect the respiratory tract of human being.
• Photochemical smog oxidizes the cellular constituents of our body and thus destroys them.
• Exposure for a period of two produces extreme fatigue and lack of CO. ordination in central nerves system.
• Inactive the enzyme.(Glucose 6 phosphate dehydrogenase).
• Free radical produced from PAN may destroy DNA.
• Exposure to PAN for several hours causes great loss of vegetation.
• Photochemical smog causes corrosion of metals, stones, building materials, textile etc.

Los Angles Smog

photochemical smog forms a serious air pollution during 1944 in some part of Los Angles, which was characterized by reduced visibility. That is why it is sometimes referred to as Los Angles Smog. It causes eye irritation and plant damage.


Composition of atmosphere

The atmosphere has three categories of constituents-

A. Major constituents-
1. Nitrogen >> 78.09 %
2. Oxygen >> 20.94 %
3. Water Vapour >> 0.1 to 5 %

B. Minor constituents-
1. Argon >> 0.934 %
2. Carbon Dioxide >> 0.0325 %

C. Trace component-
1. Ne >> 0.00182 %
2. He >> 0.000524 %
3. C2H6 >> 0.00018 %
4. Kr >> 0.00011 %
5. N2O >> 0.000025 %
6. Hydrogen >> 0.00005 %
7. CO >> 0.000012 %
8. Xe >> 0.0000087 %
9. Ozone >> 0.000002 %
10. Ammonia >> 0.000001 %
11. SO2 >> 0.0000002 %
12. NO2 >> 0.0000001 %
13. Iodine >> trace amount






For Details and Suggestion, please E-mail: zamansgs@gmail.com