Delhi's air quality crisis persists, prompting innovative but temporary solutions.
Northern plains, especially Delhi, continue to battle severe air pollution, leading to emergency measures like mist sprays.
Photo by Chris LeBoutillier
The perennial problem of severe air pollution continued to plague India's northern plains, particularly the National Capital Region (NCR), in 2025. Delhi's Air Quality Index (AQI) frequently remained in the 'severe' category during winter months, prompting the Delhi government to implement short-term measures like pole-mounted mist spray systems.
These efforts, while innovative, highlight the ongoing struggle to combat a complex environmental challenge rooted in factors like stubble burning, vehicular emissions, and industrial pollution. The persistent crisis underscores the need for comprehensive, long-term, and coordinated regional strategies to ensure breathable air for millions.
मुख्य तथ्य
Delhi's AQI often 'severe'
Pole-mounted mist sprays used as mitigation
Problem affects northern plains
UPSC परीक्षा के दृष्टिकोण
Environmental governance and policy frameworks (e.g., Air Act, EP Act, NCAP, GRAP, CAQM).
Sources and impacts of air pollution (PM2.5, PM10, NOx, SOx, O3, health effects).
Inter-state cooperation and federalism challenges in environmental management.
Technological solutions and their efficacy (e.g., mist sprays, Pusa decomposer, EVs).
Sustainable development goals and urban environmental planning.
दृश्य सामग्री
Delhi-NCR Air Pollution: Hotspots & Contributing Regions (Winter 2025)
This map illustrates the geographical extent of the National Capital Region (NCR) and highlights key areas contributing to or affected by severe air pollution, particularly during the winter months of 2025. It shows the interconnectedness of the Indo-Gangetic Plain in the air quality crisis.
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Delhi's Air Quality Crisis: Key Metrics (Winter 2024-25)
This dashboard provides a snapshot of critical air quality indicators for Delhi during the winter of 2024-25, reflecting the persistent 'severe' pollution levels and the scale of the challenge.
- Average AQI (Winter 2024-25)
- 380-450Stable (vs. previous winters)
- Peak PM2.5 Concentration (Winter 2024-25)
- 400-600 µg/m³Fluctuating
- Number of 'Severe' AQI Days (Winter 2024-25)
- 25-30 daysSlight increase
- GRAP Stages Triggered (Winter 2024-25)
- Stage IV (Emergency)Consistent
Frequently in 'Very Poor' to 'Severe' categories, indicating significant health risks for all, especially vulnerable groups. This is well above the 'Satisfactory' range (51-100).
Far exceeds the safe limit of 60 µg/m³ (24-hr average) set by CPCB. PM2.5 is the most dangerous pollutant due to its ability to penetrate deep into lungs.
A 'Severe' AQI (401-500) impacts healthy people and seriously affects those with existing diseases. These days trigger emergency measures under GRAP Stage IV.
GRAP Stage IV involves strict measures like banning non-essential construction, entry of trucks, and potentially odd-even schemes. Its frequent activation shows the severity.
और जानकारी
पृष्ठभूमि
नवीनतम घटनाक्रम
The news highlights the continued severity of air pollution in Delhi-NCR in 2025, with the Air Quality Index (AQI) frequently reaching 'severe' levels. The reliance on 'innovative but temporary solutions' like pole-mounted mist spray systems underscores the ongoing struggle to find effective, long-term remedies.
Key contributing factors remain stubble burning in neighboring states, vehicular emissions, and industrial pollution. The article emphasizes the critical need for comprehensive, coordinated regional strategies.
बहुविकल्पीय प्रश्न (MCQ)
1. Consider the following statements regarding air quality management in India: 1. The Air Quality Index (AQI) categorizes air quality based on eight major pollutants. 2. The Commission for Air Quality Management (CAQM) is a statutory body established under the Environment (Protection) Act, 1986. 3. The Graded Response Action Plan (GRAP) is implemented across the entire National Capital Region (NCR) based on the severity of air pollution. Which of the statements given above is/are correct?
उत्तर देखें
सही उत्तर: D
Statement 1 is correct: AQI considers eight pollutants: PM2.5, PM10, Ammonia, Lead, Carbon Monoxide, Nitrogen Dioxide, Sulfur Dioxide, and Ozone. Statement 2 is correct: CAQM was established by an ordinance in 2020, later replaced by an Act of Parliament, making it a statutory body under the Environment (Protection) Act, 1986. Statement 3 is correct: GRAP is a set of emergency measures implemented in the NCR to combat severe air pollution, with actions escalating as pollution levels worsen.
2. In the context of mitigating air pollution from stubble burning, which of the following measures has/have been promoted or implemented? 1. Providing Pusa Decomposer bio-solution to farmers. 2. Promoting in-situ crop residue management through machinery subsidies. 3. Banning the sale of combine harvesters without Super Straw Management Systems (SMS). Select the correct answer using the code given below:
उत्तर देखें
सही उत्तर: D
Statement 1 is correct: Pusa Decomposer is a bio-solution developed by ICAR that helps decompose crop residue in the field itself, reducing the need for burning. Statement 2 is correct: Both central and state governments provide subsidies for machinery like Happy Seeders, Super Seeders, and Zero Till Drills for in-situ management of crop residue. Statement 3 is correct: To prevent stubble burning, several states have mandated that combine harvesters must be fitted with Super Straw Management Systems (SMS) which cut and spread the straw evenly, making it easier to manage without burning.
3. Which of the following statements correctly describes the 'pole-mounted mist spray systems' mentioned in the context of Delhi's air pollution? 1. They are designed to reduce particulate matter (PM2.5 and PM10) by spraying fine water droplets. 2. They are considered a long-term, sustainable solution for regional air quality improvement. 3. Their effectiveness is significantly enhanced during periods of high wind speed and low humidity. Select the correct answer using the code given below:
उत्तर देखें
सही उत्तर: A
Statement 1 is correct: Mist spray systems work by releasing fine water droplets that bind with airborne particulate matter (PM2.5 and PM10), causing them to settle down, thus reducing their concentration in the air. Statement 2 is incorrect: The news summary explicitly states these are 'innovative but temporary solutions' and highlights the need for 'comprehensive, long-term' strategies. Mist sprays are localized and do not address the root causes of pollution. Statement 3 is incorrect: Mist sprays are generally more effective in calm conditions. High wind speeds would quickly disperse the mist, reducing its localized impact, and low humidity would cause the water droplets to evaporate faster, limiting their ability to capture particulates.
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