In the cities of our country, which among the following atmospheric gases are normally considered in calculating the value of Air Quality Index? 1. Carbon dioxide 2. Carbon monoxide 3. Nitrogen dioxide 4. Sulphur Dioxide 5. Methane Select the correct answer using the code given below

QUESTION

Medium

Environment & Ecology

Prelims 2016

In the cities of our country, which among the following atmospheric gases are normally considered in calculating the value of Air Quality Index?

Carbon dioxide
Carbon monoxide
Nitrogen dioxide
Sulphur Dioxide
Methane

Select the correct answer using the code given below

Select an option to attempt

Explanation

The Air Quality Index (AQI) is a standardized system for measuring and communicating air pollution levels. It provides a simple scale, ranging from 0 to 500, where higher values indicate worse air quality and greater health risks. The AQI is designed to help the public understand air pollution levels and take necessary precautions.

Unlike a single-pollutant measurement, the AQI considers the concentration of multiple key air pollutants, including:

Particulate Matter (PM): Tiny airborne particles, including PM2.5 (smaller than 2.5 micrometers) and PM10 (smaller than 10 micrometers). These particles can penetrate deep into the lungs, causing respiratory and cardiovascular issues.
Ground-level Ozone (O₃): A harmful gas formed by the reaction of pollutants with sunlight. It can irritate the respiratory system, trigger asthma attacks, and reduce lung function.
Nitrogen Dioxide (NO₂): Emitted from vehicle exhaust and industrial activities, it can cause inflammation of the airways and increase susceptibility to respiratory infections.
Sulfur Dioxide (SO₂): Released mainly from burning fossil fuels, it can irritate the respiratory tract and lead to lung diseases.
Carbon Monoxide (CO): A colorless, odorless gas produced by incomplete combustion of fuel. At high concentrations, it can reduce oxygen delivery to the body, leading to serious health effects.

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