Rapid infrastructure expansion in India has been accompanied by rising construction-related air pollution, with road dust and unfinished highway projects emerging as major contributors to urban particulate pollution.
Grey Cloud Phenomenon in Indian Cities
- Beyond Stubble Burning: While grey haze in Delhi-NCR is often attributed to stubble burning, similar grey clouds over Mumbai and Bengaluru suggest that the problem extends beyond stubble burning.
- Construction Dust as a Major Source: The haze largely consists of silica, cement particles, and pulverised soil generated from large-scale construction activities.
- Mechanism of Dust Formation: Heavy construction machinery and excavation processes grind soil and other materials into fine particulate matter, which remains suspended in the atmosphere, worsening urban air quality.
Infrastructure Delays and Public Cost
- Incomplete Projects: Major infrastructure projects, such as highways and flyovers, are frequently delayed.
- Currently, 574 national highway projects are overdue, trapping approximately ₹3,600 crore of taxpayers’ money.
- Political Symbolism over Completion: Politicians often rush to inaugurate tiny stretches of road for optics, while the remaining portions remain incomplete.
- Consequently, dust continues to blow off unfinished service roads for extended periods.
- The Golden Quadrilateral: Launched in 2000 to seamlessly connect Delhi, Mumbai, Chennai, and Kolkata, yet these cities remain poorly connected due to ongoing construction and gaps in the network.
Regulatory and Implementation Failures
- Shift in Pollution Sources: Reports from the National Green Tribunal (NGT) indicate that construction has overtaken transport as the leading source of dust particles and emissions.
- Violation of Rules: Despite the Construction and Demolition Waste Management Rules, compliance remains poor.
- Measures such as green curtains, windbreaks, and continuous water sprinkling are frequently ignored.
- Ineffective Mitigation: Instead of using specialised dust-control machinery, sites often rely on a single worker to manually spray water, while JCBs and bulldozers continue generating large amounts of dust.
- Lack of Accountability: Contractors often face minimal liability for delays.
- Small fines are often treated as a “construction cost” and added to the project budget, allowing contractors to maintain profit margins without altering their practices.
Health vs. Development
- Garett Hardin’s ‘Tragedy of the Commons’: Clean air is a shared resource used by everyone but protected by no one.
- Compromised Health: While infrastructure development is a national necessity, it should not come at the cost of public health.
- The present “dust economy” prioritises the pace or optics of construction over the air quality of citizens living near these projects.
Way Forward
- Strict Dust Mitigation Enforcement: Mandatory implementation of dust suppression measures and real-time monitoring of dust emissions and compliance with pollution control norms at construction sites.
- Time-bound Project Completion: Strengthen project management, accountability, and penalty mechanisms to prevent prolonged construction phases.
- Integrated Urban Air Quality Planning: Recognise construction dust as a major pollution source in urban air management strategies.
Conclusion
Infrastructure growth must be aligned with environmental governance and public health safeguards to ensure that development ensures not only improved connectivity but also clean, breathable urban environments.
11 Mar 2026
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