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Urban areas in Nigeria are suffocating. Asthma attacks, higher cancer risks, and shorter lifespans result from the visible haze of exhaust, dust, and smoke that covers the air from Lagos to Kano. Research has long identified the main causes: industrial emissions, especially from cement and petrochemical plants, vehicle exhaust, and widespread dependence on gasoline generators due to unreliable power supply. Nigeria has been slow to act decisively, even though we know the sources of this deadly health hazard.
The numbers are stark. State of Global Air reports that ambient and household air pollution was responsible for 114,000 premature deaths in Nigeria in 2017, with later analyses noting even higher estimates in subsequent years. Annual PM2.5 exposure estimates for Nigeria’s population average around 70 µg/m3 with modeled ranges from ~45–105 µg/m3, many times higher than WHO recommendations. In city-level monitoring, Lagos has recorded PM2.5 spikes well above guideline levels on many days, demonstrating the real exposure residents face.
One significant and controllable source is transportation. Nearly every city has black smoke from dilapidated cars with malfunctioning catalytic converters and badly maintained engines. Emissions testing and mandatory vehicle inspections are not optional but necessary public health measures. Changes in policy can be effective. Studies of fuel-subsidy reforms and related behavioral changes show quantifiable reductions in urban emissions following price adjustments. However, these results are subject to limitations regarding short-term impacts and the requirement for supplementary investments in clean alternatives.
Nigeria should electrify community transportation before focusing on costly private electric vehicles. According to city studies, tricycles and informal minibuses account for a significant portion of urban travel in many Nigerian cities. Private minibuses, for instance are the main mode of transportation in several mega cities in Nigeria. Therefore, switching to electric power for minibuses and “Keke Napep” would reduce emissions in areas where the majority of commuters travel. Nigeria should study and adapt the Indian model where this mode of transportation is predominantly powered by renewable energy. Electric tricycles and minibuses have already shown encouraging operating-cost and reliability gains in pilot projects and industry initiatives.
Another source of major pollution are the millions of small gasoline/diesel generators. There are an estimated 22 million small generators in Nigeria. Emissions estimates from this fleet vary by method — older analyses place genset CO2 near 29 million metric tons per year, while others estimate higher totals — but all agree generators are a large local- and national-level pollution source. Scaling rooftop solar, community microgrids, and incentives for businesses to adopt distributed renewables would displace many generators and improve air quality and energy security.
Immediate mitigation efforts should involve;
• Strengthening monitoring and public awareness.
• Expanding low-cost sensor networks run by universities and NGOs.
• Mandatory reporting of pollution-related hospital admissions nationwide.
• Enforcing vehicle inspections and industrial emission standards.
These simple and practical steps are feasible. It would if implemented increase national productivity levels and above all save lives. Nigeria should treat clean air as a right and air pollution as a mega health hazard.
•Ugochukwu Robert Odom, the author, is of the Department of Epidemiology, University of Rochester (U.S.A)
