AIR QUALITY INDEX

                                AQI

Comparision of 3 days AQI of the states of India and some international cities

What is AQI

AQI is an Air Quality Index which used    for reporting daily quality of air. It tells    you how clean or polluted your air is.... The index of the AQI ranges from 0-400+
where higher index values indicate higher levels of air pollution and higher potential for health effects. Any value larger than 300, is considered to be Hazardous, while an AQI value of 0-50, represents good air quality.

 What do you mean by AQI values                                             

• 0-50 [Good]- Air Quality is satisfactory and poses little or no health risk.
• 51-100 [Moderate]- Air Quality is acceptable and poses little health risk.
• 101-150[Unhealthy for sensitive groups]-  General public and sensitive individuals in particular  are at risk to experience irritation and respiratory problems.
• 150-200 [Unhealthy]- It probably effect the heart and lungs of the general public - particularly for sensitive group.
• 201-300 [Very unhealthy]- General public will be noticeably affected. Sensitive groups will experience reduced endurance in activities.
• 301-400+ [Hazardous]- General public and sensitive groups are at high risk to experience strong irritation and adserve health effect that could trigger other illness. 

What is PM in AQI

Particulate matter is the aspect of air pollution that has the greatest impact on our health. Those regularly exposed to harmful particles display a variety of symptoms. On a small scale, it can cause irritation, coughing, and shortness of breath. Long term, it can reduce lung function, cause irregular heartbeats, and result in premature death. People suffering from lung and heart disease, the elderly, and children are at the greatest risk.

What is PM 2.5

The classification of “PM 2.5” is reserved for particulate matter that is smaller than 2.5 microns in diameter. While particulate matter is always harmful, smaller particles are the most dangerous. They’re able to enter their way into the smallest parts of your lung. And because the smallest particles are invisible, it makes them even harder to avoid.

 What is PM 10

PM10 particles can be found in dust and smoke. PM10 are very small particles found in dust and smoke. They have a diameter of 10 micrometres (0.01 mm) or smaller. PM10 particles are a common air pollutant. 

Main Factors Of Air Pollution

• Burning fossil fuels.
• Agricultural activities.
• Exhaust from factories and industries.
• Mining operation.
• Indoor air pollution.

  Four Cities Of India

• New Delhi : As you all know that it is the capital of India. And now a days it is becoming the most polluted city in India because the of the transportation. As the Motor vehicle are the one of the main cause of poor air quality. And because of its poor air quality it damages the lungs of  2.2 million or 50% of the children. In addition, research it shows that poor air quality can lower the immune system of  children. 
• Mumbai : It is population of 12.5 million and the  most populated city in India. It has been always been a huge city of economic significance in India because of its location on the konkan coast and it's deep natural harbour. It is the capital of the state Maharashtra. And the causes of bad air quality are mainly industries in the eastern suburbs and the garbage burning by the BMC and insufficient control over emissions levels from vehicles.
• Kolkata : It is the one of the largest city and one of the major port in India. The reason behind the poor air quality is that the rampant uses of kerosene - mixed diesel by autorickshaw drivers in Kolkata Metropolitan Areas (KMA). In 2007, CNCI found that the 70% of people are suffering from respiratory disease like lung cancer, dyspnea and asthma caused by air pollution. But now a days the air pollution is decreasing because of the curfew or lockdown.
• Hyderabad: It is an industrial hub in South- east India. In this city the air quality is also poor and it caused by solid and liquid particles and certain gases can come from car and truck exhaust, factories, dust, pollen, mold spores, volcanoes and wild fires.   

    AQI Chart of 3 days of the cities of India

Four International Cities

• London: It is the capital of England and United State. The air quality of this state is getting poor because of the cold, Londoners began to burn more coals than usual. The resulting air pollution trapped by the inversion layer formed by the dense mass of cold air.
• Hongkong :  It is a metropolitan area and special administratrative region of China in the eastern Pearl River Delta by the South China Sea. It has the World highest traffic density as well as coal- burning power plant which contribute a d estimated 50%  to the total level of pollution. That said pollution from China is the major problem.
• Mexico :  It is the capital and largest city of Mexico and the most populous city in North America. This city is located in the Valley of Mexico. It was the most polluted city in the world in 1992. This is perhaps due to Mexico' s city high altitude and it's oxygen level was 25% lower and fuels do not combust completely. It causes about one in seventeen (5.9%) of all deaths in the country. It is the eighth largest cause of death, after factors such as diet, overweight, high blood pressure, alcohol and drugs, smoking and lack of exercise.
• Berlin :  It is the capital of Germany and is the most populous city proper of the European Union. Berlin is the notorious for dirty air in Germany. The local government wants to to introduce speech limits on roads to tackle the problem, while environmental groups continue to call for a diesel ban across Germany.

AQI chart of 3 days of International Cities

   

References- All the information has been gathered from Wikipedia pages and Beijing Air Quality.