Question

Air pollution
necessary points:
sources
causes
effects
preventive measure
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Please reply it's a request.
Ending the question with an hope of answer that is not taken from the internet.
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Answer 1

Hi kartik :)
Sorry! it took so much time to answer your question!

But, here it goes [...]

First of all you need to know, What is Air pollution ?

--♣ Air pollution ♣--
⇒In short, We can say that , Addition of harmful and undesirable substances which pollute the air are called Air pollution. If air contains harmful impurities, it is said to be polluted. Dust, smoke, chemical fumes, are some of the other impurities present in the air..

Now, coming to your point [...]

--♣Sources Of Air pollution ♣--
Air pollution can be caused by Natural causes or by human activities.

[Air pollution by Natural causes] :
1. Forest Fires : Huge amount of ash & smoke are released into the air whenever forest fire occurs.
2. Winds and Storms : Whenever there are strong winds and Storms, huge amount of dust and sand pollute the air.
3. Explosions & Volcanic Eruption : due to the volcanic eruptions lots of gases and particulate matter are released along with lava. Explosions also result in air pollution.

[ Air pollution caused by Human Activity] :
There are numerous points, but I would like to point out few of them, let's have a look

1. Industries : Some Industries like chemical plants, steel, fertilizers, and cement manufacturing units emit large amount of smoke and pollutants like oxides of sulphur & nitrogen, lead particles and CFC's, which pollute the air.

2. Automobiles : You might have seen that number of vehicles are increasing rapidly in our cities. The exhaust emission from vehicles contain poisonous substances like sulphur dioxide, carbon dioxide, lead, nitrogen oxides and smoke which cause air pollution on entering in the environment.

3. CFC's (chlorofluorocarbons) : In refrigerators, Fire Extinguishers and aerosol sprayers pollute air by depleting the ozone layer.

4. Agricultural Activities : Excessive use of fertilisers & pesticides in agriculture polluted the air. Pesticides are those chemical compounds which are used for killing pests that destroy agricultural production or in some way are harmful to humans.

5. Deforestation : Indiscriminate cutting of trees and clearing of forests increase the amount of Co₂ in the atmosphere and thereby, pollutes it.

--♣ Prevention Of Air pollution ♣--
We all know that we need a healthy and clean air for breathing.The task of cleaning up air and improving it's quality are not very difficult. For this, we need to take some steps, Such steps are as follows :-

⇒We can plant more and more trees and nurture the ones already present in the neighborhood. Because they are the nature's lungs and remove Harmful gases.
⇒We should reduce the use of aerosols and sprays such as perfumes, deodorant sprays, cosmetics and other similar sprays in homes, becoz their solid or liquid particles remain suspended in the air for long.
⇒We should not burn paper, dry leaves, plastic bags and garbage. Instead, they can be put in a compost pit rather than burning.
⇒Use of CNG (Compressed Natural Gas) Should be encouraged.
⇒Tall chimneys filled with filters should be installed in factories. So that the air is not polluted much near the surface of the earth.
⇒You should Advice your parents for travelling by car pool instead of travelling by car individually.
⇒Pesticides like DDT should not be used. Many countries have banned the use of dangerous pesticides, and have found ways of safe disposal of wastes.
⇒Smoking should be avoided. Government is also trying to discourage people from smoking.

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Hope my answer helped !

Good luck :)
Cheers!