The global push to speed up the climate transition is entering a tougher, more practical phase. The debate is no longer only about whether countries should move away from fossil fuels; it is increasingly about how fast they can do it, who pays for it, and whether poorer countries will be given enough financial room to make the shift without deepening debt and inequality. That tension sat at the center of a first-of-its-kind international summit in Santa Marta, Colombia, where representatives from 56 countries focused on the mechanics of moving beyond coal, oil and gas.
The Colombia meeting did not produce binding global commitments, but it did mark a noticeable change in tone. Officials and experts said the conversation is moving from broad promises to implementation, with working groups set up around finance and labor transitions. That matters, because the biggest barrier identified by participants was not a lack of climate ambition on paper; it was a lack of affordable financing, especially for countries in the Global South that remain heavily exposed to debt, energy insecurity and volatile commodity markets.
That financing gap is becoming harder to ignore. The European Commission said in March that delivering the clean energy transition in Europe alone will require about €660 billion per year until 2030, rising to €695 billion annually in the following decade. Those figures underline the scale of investment needed even in relatively wealthy economies with deep capital markets. For lower-income countries, the challenge is sharper: they are often being asked to decarbonize faster while borrowing at much higher cost.
At the same time, the energy transition is no longer a fringe story about future technology. The International Energy Agency said in its Global Energy Review 2026 that the deployment of solar, wind, nuclear, electric cars and heat pumps since 2019 is now avoiding around 3 billion tonnes of CO2 annually, roughly 8% of global emissions. That is a big signal that clean technologies are already reshaping energy demand in the real world, not just in climate models or conference speeches.
Still, momentum is uneven. Colombia’s summit highlighted that many governments want to accelerate the shift away from fossil fuels, but they are struggling with the politics of jobs, subsidies, industrial competitiveness and public consent. The summit also exposed a blunt reality: countries that depend on fossil fuel income or still lack reliable energy access cannot simply switch systems overnight. That is why participants placed heavy emphasis on “just transition” planning, labor protections and financial restructuring rather than slogans alone.
There is also a broader development problem wrapped inside the climate story. The 2026 Financing for Sustainable Development Report says the world is dealing with slower growth, elevated debt burdens and tighter fiscal conditions, all of which limit governments’ ability to fund long-term transitions. In plain terms, many states know what they need to build, but they do not have the budget space or cheap capital to build it at the required speed.
That helps explain why climate diplomacy is shifting toward industrial policy and investment strategy. Europe is trying to accelerate clean-energy spending through a dedicated investment strategy tied to energy security and affordability. Internationally, the emerging message is similar: climate action is no longer being sold only as an environmental obligation, but also as a competitiveness issue, a resilience issue and, increasingly, a financial-system issue.
The real test now is whether governments can turn this new urgency into bankable projects, stable rules and fairer financing terms. Clean technology is advancing. Political language is changing. But unless capital starts flowing faster and more equitably, the climate transition will keep moving in bursts rather than at the pace scientists and policymakers say is needed. That, more than anything, is the story of 2026: the transition is no longer waiting for proof of concept. It is waiting for scale.
