In this slide you will get to know about air pollution, its main causes and the ill effects which we are facing now a days. Some case studies have been included in this slide. What measures we can take to prevent air pollution has been mentioned at last.

1. DETAIL STUDY OF AIR POLLUTION
PRESENTED BY :- UJJWAL KUMAR
ROLL NO:- 37
REG. NO:- 11811419

2. Contents:-
 Introduction
 Types of air pollution
 Effect of air pollution
 Historical disasters

3. INTRODUCTION:-
Air pollution occurs when harmful gases or particulates are introduced into
earth’s atmosphere. It may cause diseases, allergies & even death to humans.
It may also cause harm to other living organism such as animals & food crops.
Both human activities natural processes can generate air pollution.
An air pollutant is a substance in the air that can have adverse effects on
humans and the ecosystem.
The substance can be solid particles, liquid droplets or gases.

4. Types of air pollution:-
Types
Man-made air
pollution
Natural air
pollution

5. 1. Man-made air pollution
 Air pollution due to human activities is named as man made air pollution.
 It may be classified into three facts:-
Domestic
Vehicular
Industrial

6. Domestic facts:-
 Smoke from kitchen caused by cooking released in the air.
 Use of refrigerators for household cooling purpose.
 Excessive use of pesticides including different sprays (Anti-mosquito, DDT,
etc).
 Aerosols (Sprays, perfumes, air freshner).

7. Vehicular facts:-
 Carbon monoxide which is caused by the incomplete combustion released
in air.
 Smoke released from buses, cars, motorcycles and other vehicles.

8. Industrial facts:-
 Gases released from different industries including carbon monoxide,
carbon dioxide, sulfur dioxide, nitrogen dioxide, etc.
 They release smoke and minute particles which are toxic to environment.

9. 2. Natural air pollution
 An eruption volcano emits particulate matter and gases, forest fires can
emit large quantities of pollutants.
 Dust storms, tornadoes can create large amounts of particulate matter.
 Volatile organic compounds, sometimes referred to as VOCs are organic
compounds that easily become vapors or gases.
 If we talk about volcanic eruption, it launches a tremendous amount of
soot & ash into the atmosphere along with CO2, CO, oxides of nitrogen &
sulfur.

11. Effects of air pollution:-
 Respiratory and heart problems
 Global warming
 Acid rain
 Depletion of ozone layer

12. Respiratory &
heart problems
Asthma,
pneumonia
Lungs cancer Bronchitis

13. Global warming:-
 It is the gradual heating of Earth’s surface, ocean & atmosphere.
 As the worldwide temperature increases, it results in melting of polar
icecaps and hence water level will increase.

14. Acid rain:-
 Harmful gases like NO2 & SO2 are released into the atmosphere during
the burning of fossil fuels.
 When it rains, the water droplets combines with these air pollutants,
becomes acidic and then falls on the ground in the form of acid rain.

15. Depletion of ozone layer:-
 Ozone exists in earth’s stratosphere and is responsible for protecting
humans from harmful UV rays.
 It is depleting due to the presence of CFC in the atmosphere.
 Ozone depletion causes skin cancer, damage to plants & sunburns.

16. Historical disasters:-
Great smog
of London
Dec 1952.
Bhopal gas
disaster
Dec 1984.
Smog in
Pakistan
Nov 2016.
Burning of
crops in
Jalandhar
2016

17. Steps to prevent air pollution:-
 Walk or ride a bicycle whenever possible.
 When buying a new car, choose one that is lowest polluting.
 Public transports should be preferred.
 Only use energy star appliances.
 Plant trees as much as you can.
 Say NO to crackers during festivals.
 E-vehicels should be promoted.