The carbon billions Nigerian states are leaving uncollected

There is a conversation that is not happening in Nigeria's government houses. And its absence is costing states billions of naira every single year.

Nigeria's 36 states raised a combined N3.63 trillion in IGR in 2024. Commendable. But nearly 64% of that comes from PAYE taxes, a base that new legislation will begin to erode from 2026. So states will face pressure to borrow more, do more with less, or find new revenue streams.

The new revenue stream already exists. Most states simply have not looked for it.

The greatest underdeveloped natural resource in Nigeria today is not oil beneath the ground. It is the carbon stored above it: in forests, mangroves and the cooking fires of 40 million households.

What states are leaving uncollected

Nigeria holds 4.9 million hectares of forest and 9,723 square kilometres of mangroves across the Niger Delta, the fourth largest mangrove coverage on earth. Forty million households cook daily on firewood or charcoal. Gas flares burn across the oil states around the clock.

Every one of these is a carbon asset. Each can be registered, verified and sold on the global carbon market to corporations meeting net-zero targets. The federal government's own Carbon Market Activation Policy (2025) puts Nigeria's annual potential at 87.2 to 124.7 million tonnes of CO₂ equivalent, worth $736 million to $2.5 billion by 2030, rising to $3 billion annually over the decade.

That potential sits in state forests, coastal waters and rural kitchens. Not in Abuja.

Cross River State's entire IGR in 2023 was N31.56 billion. A credible REDD+ programme over its existing forest, trees already standing, could yield between N64 billion and N192 billion annually. Without taxing a single citizen.

The human case: women and clean air

Indoor air pollution from traditional biomass cooking kills an estimated 95,000 Nigerians every year (WHO). Women and children under five bear the overwhelming burden, spending hours breathing toxic smoke from open fires in poorly ventilated kitchens.

Clean cookstove programmes eliminate that smoke, reduce household fuel costs by up to 52%, and simultaneously generate verified carbon credits that states can register and sell. Revenue from cookstove credits across Africa quadrupled from $25 million in 2020 to $107 million in 2024. The market is real, it is growing, and Nigeria is barely in it.

These outcomes are not in competition. They are the same programme.

The federal framework is already in place

Nigeria's Carbon Market Activation Policy was finalised in March 2025. The national carbon registry has been operational since 2024. The National Carbon Market Framework activated the Climate Change Fund. Nigeria is now eligible for financing from the Green Climate Fund, the African Development Bank and bilateral climate programmes from the EU, Germany and the United Kingdom.

The foundational work is done. Delta State demonstrated in 2024 what is possible when a government treats this as a revenue priority: a 30-year agreement with Serendib Capital to restore 250,000 hectares of mangroves, projecting 5.32 million tonnes of CO₂ sequestered annually. The state provides land rights and facilitation. The developer brings capital, expertise and market access. That model is replicable by any state with comparable assets, and most Nigerian states have them.

Six things every governor must do now

1. Establish a Green Finance Unit reporting directly to the Governor's Office, not the Ministry of Environment. This is a revenue strategy. It must sit where budget decisions are made.
2. Commission a Carbon Asset Inventory: GIS mapping of every hectare of forest, mangrove, degraded land and rural cooking population. You cannot earn from what you have not counted.
3. Enact a state-level legal framework that assigns ownership of carbon assets and establishes revenue-sharing arrangements with local governments and host communities.
4. Issue PPP calls to carbon project developers for REDD+, blue carbon and methane abatement programmes. Developers are actively seeking Nigerian state partners today. They bring the capital. The state brings the assets.
5. Launch a clean cooking programme targeting at minimum 500,000 households, registered with an international carbon standard and generating verifiable credits within the first year of operation.
6. Ring-fence all carbon revenues in a State Green Finance Trust Fund governed by a transparent, independent board. That is the structure multilateral financiers require before releasing concessional capital.

States that act in 2026 will secure first-mover advantage in their ecological zones, attract the strongest development partners and begin collecting revenues before the decade closes. States that wait will find the best partnerships committed elsewhere.

Nigeria's forest cover is declining at 350,000 to 400,000 hectares per year. Every hectare cleared is a carbon asset that can never be registered or sold. Every year of delay is revenue that cannot be recovered.

Green finance is not an environmental programme dressed up in fiscal language. It is a revenue strategy that also saves forests, creates employment and stops women from dying of cooking smoke. It asks nothing of citizens, except that their governors pay attention to the assets those citizens have inherited, and that the world is prepared to pay for.

The forests are standing. The mangroves are there. The market is open. The only thing standing between Nigerian states and this revenue is the decision to pursue it.

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