Explanation: The Indo-Gangetic plain, a vast alluvial plain that stretches across northern India, is recognized as the most polluted region in the country, as per the recent study conducted by the Central Pollution Control Board (CPCB) and IIT Delhi. This region encompasses several major cities, including Delhi, Kanpur, Lucknow, and Patna, which are frequently listed among the most polluted cities globally.
The high pollution levels in the Indo-Gangetic plain are attributed to a combination of factors. Industrial emissions from factories and power plants contribute significantly to the pollution. The region is home to numerous industries, including textiles, chemicals, and food processing, which release pollutants into the air. Additionally, vehicular exhaust from the dense traffic in urban areas adds to the pollution. The Indo-Gangetic plain is one of the most densely populated regions in the world, with a high concentration of vehicles, especially in cities like Delhi.
Agricultural practices, particularly crop burning, are another major contributor to pollution in this region. Farmers often burn crop residues after harvest to clear the fields for the next planting season. This practice releases large amounts of particulate matter and other pollutants into the air, exacerbating the pollution problem, especially during the post-harvest season.
The pollution in the Indo-Gangetic plain is further compounded by meteorological factors. The region experiences a unique combination of climatic conditions that trap pollutants, leading to high concentrations of particulate matter and other pollutants in the air. The topography of the region, with the Himalayas to the north, can act as a barrier, preventing the dispersion of pollutants.
In contrast, the Western Coastal plain and Southern India generally have better air quality. The Western Coastal plain benefits from sea breezes that help disperse pollutants, while Southern India has fewer industrial activities and less vehicular congestion compared to the northern regions.
Understanding the pollution levels in different regions of India is crucial for developing effective strategies to combat pollution and improve air quality. The Indo-Gangetic plain, being the most polluted region, requires targeted interventions to address the sources of pollution and mitigate its impact on public health and the environment.