The Real Cost of Firewood: What Indoor Air Pollution Is Doing to Nigerian Families
Eight hundred and fifty-five Nigerians die every day from breathing the air inside their own homes. Eleven thousand six hundred and twenty-four more fall ill on that same day with respiratory infections, lung disease, or cardiovascular complications traceable to one thing: the smoke from cooking on biomass — firewood, charcoal, agricultural waste — in poorly ventilated kitchens. The death toll is the equivalent of a passenger jet crashing every twenty-four hours, with mostly women and children on board. We have decided, as a country, not to call it that.
This post is about why that decision is starting to break — and why the choice to keep cooking on firewood is, in 2026, no longer mostly a price decision.
What's actually in the smoke
A burning wood fire in a poorly ventilated indoor space produces a soup of pollutants the human respiratory system has no defence against:
- PM2.5 — fine particulate matter so small it passes through the lungs into the bloodstream. The WHO 24-hour exposure limit for PM2.5 is 15 micrograms per cubic metre. Cooking smoke in a typical rural Nigerian kitchen pushes that figure into the hundreds, sometimes thousands.
- Carbon monoxide — the same gas that kills people in faulty boilers. Long-term low-dose exposure damages the heart and brain even when it doesn't kill outright.
- Formaldehyde and benzene — both classified by the IARC (International Agency for Research on Cancer) as Group 1 carcinogens, in concentrations comparable to industrial workplace exposure.
- Polycyclic aromatic hydrocarbons (PAHs) — the same compounds that make cigarette smoke carcinogenic.
The comparison is uncomfortable but useful: spending a few hours a day next to an open biomass cooking fire delivers a PM2.5 dose comparable to smoking several packs of cigarettes a day. Except the smoker chose, and the cook didn't.
Who's actually breathing it
The 855-deaths-per-day figure isn't distributed evenly. It falls almost entirely on three groups:
Women, because cooking remains overwhelmingly a woman's task in rural Nigerian households. Mothers, daughters, grandmothers — the people who spend the most time tending the fire are the people accumulating the most damage.
Children under five, because their lungs are still forming, their immune systems are still developing, and they are typically strapped to or playing next to the person doing the cooking. Childhood pneumonia is among the largest causes of under-five mortality in Nigeria, and a substantial share of it is driven by indoor air pollution.
Rural and peri-urban households, because that's where firewood is still the default fuel. Urban LPG penetration has climbed steadily — in Lagos, Abuja and parts of Port Harcourt, clean cooking is now the norm. In Kwara villages, in Kebbi, in Zamfara, in much of the rural North and Middle Belt, it's still the exception.
The diseases the smoke causes
The 11,624 daily disease cases roll up into a recurring shortlist:
Acute lower respiratory infections, especially pneumonia in children — the largest single bucket. Indoor air pollution roughly doubles a child's risk.
Chronic obstructive pulmonary disease (COPD). A condition we still associate culturally with heavy smokers — but a thirty-year-old mother who has cooked over wood since adolescence carries a comparable lung-damage burden. Many present too late for treatment.
Stroke and cardiovascular disease. Long-term PM2.5 exposure damages the vascular system. The link is well-documented; the Global Burden of Disease study places household air pollution in the top ten global risk factors for cardiovascular death.
Lung cancer. Particularly adenocarcinoma in non-smoking women. The case-control evidence from China and parts of South Asia is overwhelming; the data from sub-Saharan Africa is sparser but pointing in the same direction.
Low birth weight and stillbirth. The smoke isn't only damaging the cook — it's damaging the pregnancy.
"Free" firewood isn't free
The case that always gets made for firewood is that it's free. It isn't.
In rural Kwara in 2026, a household cooking for five on firewood spends between ₦200 and ₦500 per day when they buy it, or sends a family member — usually a woman or girl — to gather it for two to four hours daily when they don't. That gathering time has a cost too: education foregone, income foregone, exposure to physical risk en route.
The monthly cooking-fuel cost for a firewood household, when you account for either purchases or gathered fuel converted to its market price, is in the range of ₦6,000 to ₦15,000.
A 12.5 kg LPG cylinder refill — enough cooking gas for that same household for roughly five to six weeks — costs around ₦12,500 to ₦14,500 in our catchment as of mid-2026.
On a per-cooking-day basis, LPG is already cheaper than firewood in most rural Nigerian settings the moment you account for the gathering time. What blocks switching is access (a working cylinder, a nearby refill point, a regulator that doesn't leak) and a working-capital cliff (the first cylinder is expensive even though every refill after isn't).
Why LPG is the bridge fuel — even though it isn't perfect
LPG is a fossil fuel. It emits carbon dioxide. In a perfect world, every Nigerian household would cook on renewable electricity tomorrow. We do not live in that world, and households dying today cannot wait for it.
What LPG does, today:
- Cuts indoor PM2.5 by approximately 98% when displacing wood-fire cooking. That's the figure that matters for the 855-per-day.
- Eliminates the carcinogens — formaldehyde, benzene, PAHs — that biomass smoke carries.
- Returns 2–4 hours per day to women and girls who would otherwise be gathering fuel.
- Reduces deforestation pressure in catchments where firewood gathering has stripped local tree cover.
It also has a credible upgrade path. The same household that switches to LPG in 2026 can layer in solar cooking, induction stoves, or biogas as those technologies become affordable and accessible. A household stuck on firewood has no such glide-path; it's locked into the smoke for as long as the wood is cheaper than the alternative.
What we're seeing on the ground
In our Ilesha Baruba catchment in Kwara State, the households that switch to LPG do so for a hierarchy of reasons that surprised us:
- The smell. Customers cite smoke odour in their hair, on their clothes, in their homes more often than they cite health.
- Cooking speed. A pot of jollof in 25 minutes instead of 75 minutes is a tangible weekly gain.
- Cleanliness. Black soot on walls, ceilings, and cookware adds up to a real maintenance cost.
- The cough. This one always comes last in the conversation. But it's always there.
The health framing is the one that should land hardest — and the one we mention least. Our customers know what the smoke is doing. They don't need a lecture. They need a working cylinder within walking distance, at a price they can refill on payday.
What needs to happen
Three things, in order:
Access. More licensed rural plants, more refill points, shorter walking distances. This is the gap we and other rural operators are working to close. There needs to be more of us.
Affordability of the entry cost. The cylinder itself is the cliff. Government programmes, NGO partnerships, and private financing models that defray that first ₦20,000–₦30,000 outlay are the single most important policy lever — more important than fuel subsidies, in our experience.
Honesty in the public narrative. A passenger plane crashing every day with women and children aboard would be a national emergency. The fact that 855 quiet deaths a day don't generate the same response is a story we, as Nigerians, should change.
FahmanEnergy distributes solar-powered LPG to rural households in Kwara State, Nigeria — plant in Ilesha Baruba, head office in Ilorin. If you operate a rural plant, finance one, or live in a household still cooking on firewood, we'd like to hear from you. Contact us.
Sources: daily-deaths and daily-disease-case estimates synthesise published data from the World Health Organization, the Federal Ministry of Health, the Global Burden of Disease study, and the Nigerian Clean Cooking Alliance. The ~98% PM2.5 reduction figure for LPG-vs-biomass cooking is from intervention studies summarised in the WHO Indoor Air Quality Guidelines for Household Fuel Combustion.