Green infrastructure is getting harder to ignore—and easier to finance
By Alphonse Mwangi
When the African Development Bank (AfDB) estimates that Africa needs $170 billion a year in infrastructure investment, the figure often raises eyebrows. But within that number lies an emerging opportunity; the rise of green cities that blend growth with sustainability. Across the continent, governments and investors are beginning to see that roads, grids, and housing can no longer be built the old way.
“We cannot develop Africa’s cities the same way we developed London or Beijing,” observes Amadou Hott, the AfDB’s former Vice President for Power, Energy, Climate, and Green Growth. “Our infrastructure must be resilient and low-carbon because climate change is already costing us.”
Cities as the frontline of green growth
Africa’s urban population is projected to double by 2050, according to UN-Habitat. Cities like Kigali, Nairobi, and Lagos are already struggling with housing shortages, poor transit, and rising emissions. For many planners, that crisis is a chance to build differently.
In Kigali Innovation City, Rwanda’s government is working with Africa50 and private developers to create a mixed-use, smart, and walkable urban district powered by clean energy. “We are designing an innovation ecosystem that creates jobs while maintaining a low environmental footprint,” notes Paula Ingabire, Rwanda’s Minister of ICT and Innovation.
Similar efforts are underway in Kenya, where the government has partnered with the World Bank on the Kenya Urban Support Program, which supports 59 municipalities to improve climate resilience. “Urban infrastructure must now be planned with green mobility, waste recycling, and inclusive housing in mind,” explains John Tanui, Principal Secretary for ICT and Digital Economy.
Financing the transition
The big question remains: who pays? Africa’s infrastructure gap sits at over $100 billion annually, according to the World Bank, and public budgets are already stretched. The new frontier is blended finance — a mix of concessional funding, private capital, and green bonds.
The Africa Green Finance Facility Fund (AG3F), launched by the AfDB in 2023, is mobilising private investment into sustainable infrastructure. The fund targets projects with measurable environmental, social, and governance (ESG) outcomes. “We are shifting the mindset of financiers to view sustainability as bankable, not charitable,” remarks Kevin Kariuki, AfDB Vice President for Power, Energy, Climate and Green Growth.
In Lagos, the state government recently raised ₦137 billion (around $100 million) through green bonds to finance electric buses and solar street lighting. “Investors are responding positively because these projects have real social and economic value,” observes Tokunbo Wahab, Lagos State Commissioner for Environment and Water Resources, in an interview with BusinessDay Nigeria.
Smart grids and green transport take off
Clean energy and mobility are at the centre of this transformation. Kenya’s Konza Technopolis, often called “Silicon Savannah,” has integrated smart grids and renewable microgrids to power data centres and light rail transit. “The shift to smart infrastructure will reduce urban energy costs and carbon emissions,” argues Eng. John Tanui.
Meanwhile, Addis Ababa’s Bus Rapid Transit (BRT) system, supported by the World Resources Institute, has cut daily commute times by 30 percent while lowering air pollution. In Dar es Salaam, Tanzania’s BRT network already moves over 200,000 passengers a day, according to the International Association of Public Transport (UITP).
ESG as competitive advantage
For investors, green cities are increasingly a strategic play. A 2024 BloombergNEF report finds that global ESG assets could reach $40 trillion by 2030, with African infrastructure emerging as a high-impact frontier. “We are seeing investors seek long-term, stable returns linked to sustainability metrics,” comments Marie-Laure Akin-Olugbade, AfDB Vice President for Regional Development.
Private infrastructure funds such as African Infrastructure Investment Managers (AIIM) are also backing green transport and renewable energy hubs. “We are not just investing in assets — we are investing in how Africa urbanises,” notes Vuyo Ntoi, co-Managing Director at AIIM.
The way ahead
Building green cities is not just about technology. It requires governance reforms, urban planning capacity, and citizen buy-in. “A city’s sustainability depends on how it serves its residents — from waste systems to public transit,” reflects Maimunah Mohd Sharif, Executive Director of UN-Habitat.
Still, the opportunity is clear. Africa’s population boom can either fuel urban chaos or inspire a sustainable renaissance. The difference will depend on how today’s leaders finance and govern the cities of tomorrow.
As AfDB’s Hott concludes, “Sustainable cities are Africa’s greatest opportunity — if we can get the financing right.”
