25/10/2025
The Problem: Unhealthy Air, Urgent Impacts
The air in Dhaka currently records an AQI (Air Quality Index) around 169, a level categorized as “Unhealthy”. At this level, everyone may experience adverse health effects, and sensitive groups (children, the elderly, people with respiratory problems) are at even greater risk.
The underlying pollutant of most concern is fine particulate matter (PM₂.₅) — tiny particles that pe*****te deep into lungs and even the bloodstream. For Dhaka, the PM₂.₅ concentrations are many times above the requirements set by the World Health Organization (WHO).
According to recent assessments:
• Around 85 % of air pollution in Dhaka originates from brick kilns, surface dust, and vehicle emissions.
• Exposure to high PM₂.₅ levels in Bangladesh reduce average life expectancy by several years.
• The health–economic toll is considerable: more respiratory diseases, cardiovascular issues, and reduced productivity.
In short, households, businesses, and public health are all feeling the effects of this “silent killer”.
Why Is Dhaka’s Air So Poor?
Several interlocking factors combine to make Dhaka one of the more polluted major cities. Key drivers include:
1. Brick Kilns & Coal/Wood Burn
Thousands of brick kilns around Dhaka burn coal and wood in outdated technology, releasing soot, fine particles, and toxic gases. They are a major contributor.
2. Vehicle Emissions & Traffic Congestion
Rapidly increasing numbers of vehicles, many older and with poor emission controls, lead to high exhaust pollution (NO₂, black carbon, fine particles). Traffic congestion also means idling engines and more pollution per km.
3. Construction, Dust, and Urban Growth
Rapid urbanization means heavy construction sites, land-fills, sand‐filling, dust from roads and building sites—all raising PM levels.
4. Industrial & Domestic Fuel Use
Factories, power generation, biomass fuels, and burning of waste all add to the mix of pollutants.
5. Meteorology & Geography
Dhaka’s climate (winter dry season, low rainfall) plus local geography create conditions where pollutants accumulate rather than disperse.
These factors combine into a “perfect storm” of pollution.
The Human & Economic Cost
The consequences aren’t just about hazy skies or smoggy sunsets — they hit people’s health, finances, and quality of life.
Some key insights:
• Elevated PM₂.₅ levels are linked to increased incidence of asthma, chronic obstructive pulmonary disease (COPD), strokes, heart attacks, and lung cancer.
• Children living near major construction/traffic sites face significantly higher rates of respiratory infections.
• Economically, air pollution in Bangladesh has been estimated to cost roughly 4 % of GDP due to health costs and lost productivity.
• Socially, poor air quality undermines outdoor life, mobility, and recreation, and adds stress, especially for vulnerable groups (elderly, people with disabilities).
Solutions: What Can Be Done?
Certainly, the problem is substantial, but there are clear pathways for improvement — both at the policy level and at the individual/community levels. Here are key strategies:
Policy & Infrastructure Measures
Clean Vehicle Standards & Public Transport: Transitioning to lower-emission vehicles, enforcing vehicle inspection & maintenance, expanding efficient public transport so fewer people rely on private polluting vehicles.
Modernizing Brick Kilns & Industrial Emissions: Upgrading technologies in kilns (e.g., more efficient kilns, switching to cleaner fuels), stricter enforcement of emission controls in factories.
Dust control & Construction Regulation: Requiring dust suppression at construction sites, proper landfills, covering materials, enforcing speed and road spraying in high‐dust zones.
Urban Planning & Green Spaces: Increasing green areas to absorb particulates, improving airflow in the city, and reducing heat island effects.
Public Health Monitoring & Awareness: Expanding air-quality monitoring networks, making data publicly available, and issuing alerts when levels get dangerously high.
Cross-sector Coordination: Government, industry, transport authorities, city planners, all working together — pollution isn’t just one department’s problem.
Community & Individual Actions
• On days with high pollution: limit strenuous outdoor activity, wear high-quality masks (e.g., N95/KN95), keep windows closed at home, and use air purifiers if available.
• Support and use public transport, car-pooling, walking/cycling where feasible (especially when air quality is acceptable).
• Advocate in neighborhoods for tree-planting, dust control, and cleaner local practices.
• Stay informed via air-quality apps and local alerts so you can plan outdoor activity accordingly.
Novel/Long-Term Ideas
• Encourage adoption of electric vehicles (EVs): Studies show strong potential to reduce particulate levels significantly in Dhaka if infrastructure and incentives are provided.
• Smart city technologies: air-quality sensors networked across the city, real-time dashboards, predictive modelling for forecasting poor air-quality days and guiding action.
• Incentivize industries to invest in cleaner production technologies and transition away from high-polluting legacy equipment.
Insights & Take-aways for Dhaka’s Future
• Urgency: Given the health and economic stakes, this isn’t an issue that can be deferred. The effects are compounding.
• Targeted Interventions: Focusing efforts where the greatest pollution comes from (kilns, vehicles, dust) will give the most “bang for the buck”.
• Monitoring + Enforcement: Without data and regulation enforcement, policies too often remain on paper.
• Equity & Health: The poorest, most vulnerable bear the brunt of pollution (living near busy roads, working outdoors, less able to protect themselves). Solutions must factor in equity.
• Behavior Change Matters: Technology and policy are necessary, but individual and collective behavior (commuting choices, waste burning, construction practices) also count.
• Resilience: As climate change brings more extreme weather and temperature, pollution may interact with heat/stress in unpredictable ways — building resilience matters.
Conclusion
Dhaka’s air-quality challenge is serious but not hopeless. With coordinated policy action, infrastructure investment, community participation, and individual awareness, meaningful improvement is possible. For the city to thrive — for its residents to breathe easier, live healthier, and participate fully — air-cleaning must become a priority, not a sideline.
