Discuss the impacts of urbanization. Explain the challenges to sustainable urbanization.

Urbanization refers to the increasing number of people living in urban areas, a phenomenon driven by industrialization, economic development, and social transformation. While urbanization has brought economic growth, modernization, and improved access to services, it has also triggered numerous environmental, social, and infrastructural challenges. The environmental impacts of urbanization are significant and multifaceted, affecting air quality, water resources, land use, biodiversity, and overall ecosystem health.

Impacts of Urbanization

1. Air Pollution: Urban areas are hubs of transportation, industrial activities, and energy consumption. These activities release large amounts of pollutants such as carbon monoxide (CO), nitrogen oxides (NOx), sulfur dioxide (SO₂), volatile organic compounds (VOCs), and particulate matter (PM2.5 and PM10) into the atmosphere. The concentration of vehicles and industries in cities leads to poor air quality, which has severe implications for public health, particularly respiratory and cardiovascular diseases. Smog formation in large metropolitan cities like Delhi, Beijing, and Los Angeles is a visible manifestation of urban air pollution.

2. Water Pollution and Scarcity: Urbanization exerts tremendous pressure on water resources. The discharge of untreated or inadequately treated sewage and industrial effluents into rivers, lakes, __________ ____ ______ ____ _______ ______ ___ ___ ______ _____ ________.
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