Charting the Path to a Fossil-Free Future in Santa Marta and Beyond: What the Conference Must Deliver

Published April 14, 2026

By Nikki Reisch, Director for the Climate and Energy Program, and Lili Fuhr, Director of the Fossil Economy Program, at the Center for International Environmental Law.

Governments and climate leaders gather this month in Santa Marta, Colombia for the First Conference on Transitioning Away from Fossil Fuels. This landmark conference is happening  as millions suffer from devastating and unlawful wars, and the global economy reels from oil price shocks. The task for those attending is clear: not to debate whether to phase out fossil fuels but to determine how to do it — rapidly, fairly, and in line with science and the law.

Co-hosted by the governments of Colombia and the Netherlands (April 24–29), the Santa Marta conference will gather more than fifty countries from around the world to work on implementing a managed, financed, and equitable fossil fuel phaseout. That the gathering is happening is itself progress, particularly after decades of obstruction at the United Nations Framework Convention on Climate Change (UNFCCC), where a handful of countries have held climate action hostage and made fossil fuels taboo.

The enthusiasm the conference has generated — and the written submissions it has elicited on strategies to overcome economic dependence on oil, gas, and coal, transform supply and demand, and advance international cooperation and diplomacy — signals a turning point. The momentum for coordinated global action to move away from fossil fuels is unstoppable. 

This conference could not come at a more crucial time, as the escalating climate crisis, mounting geopolitical turmoil, and violent conflicts deepen human suffering, upend economies, and lay bare why continued dependence on fossil fuels is a colossal vulnerability. It has never been more urgent to leave behind oil, gas, and coal than it is today.

CIEL, along with other civil society organizations, Indigenous Peoples, and frontline communities, will be present in Santa Marta. We will push States to act in line with their existing legal obligations to phase out all fossil fuels — including by advancing a Fossil Fuel Treaty that can govern a just and rights-based transition. 

The Duty to Phase Out Fossil Fuels

Less than a year ago, the International Court of Justice (ICJ) clarified that States have obligations under multiple sources of international law to prevent climate harm and protect the climate system. The court  also affirmed that States have a duty to cooperate — effectively and in good faith — toward that end. Meeting these obligations requires coordinated action to address the primary driver of climate change: fossil fuels.

The implications are clear. States must cooperate to tackle the policies, norms, and practices that lock in fossil fuel production, facilitate expansion, delay phaseout, and sustain the fossil economy. This includes eliminating mechanisms like Investor-State Dispute Settlement (ISDS) that allow fossil fuel companies to demand compensation when governments take climate action, potentially making it prohibitive for countries to comply with their phaseout obligations. The law requires ending new fossil fuel licensing and public subsidies; halting the buildout of oil and gas — especially in the ocean; tackling petrochemicals used for products like plastics and ammonia; and rejecting dangerous distractions like carbon capture, offsets, and geoengineering, which only prolong the fossil fuel era and introduce new risks.

Why Santa Marta Must Advance a Pathway for a Fossil Fuel Treaty

A legally binding international agreement focused on fossil fuel supply—a Fossil Fuel Treaty—would provide a framework for countries to cooperate effectively on the  phaseout of oil, gas, and coal, and manage the transition in a just and equitable way. In doing so, it would fill a governance gap on fossil fuels, while complementing and supporting existing multilateral processes under the UNFCCC and the Paris Agreement. These processes focus largely on climate action at the national level, including through nationally determined contributions (NDCs) for emissions reduction and adaptation, with support and finance based on historical responsibility and equity.

The Santa Marta conference offers a critical opportunity to build support for the negotiation of a Fossil Fuel Treaty that facilitates reciprocal and collective State action  toward a fossil-free future. A Treaty would enable countries to align timelines, shape how phaseout unfolds, remove barriers to the transition, and reduce the costs while increasing the benefits of leaving oil, gas, and coal behind.

What a Credible Transition Requires

As States gather in Santa Marta, several issues must be on the table:

Eliminating Barriers to Phase Out

States can’t comply with their legal duties to phase out fossil fuels if they risk being sued by fossil fuel investors for enormous sums of money. Yet,ISDS allows just that, making it prohibitively costly for States to curb fossil fuel production, consumption, licensing, and subsidies as science demands and the law requires.  At Santa Marta, we will look for States to recognize ISDS as a structural barrier to phaseout and take steps to dismantle it.

Speculative, ineffective, and harmful responses to climate change, such as carbon capture, offsets, and geoengineering, are additional barriers that delay phaseout and divert resources from proven climate solutions. These dangerous technologies perpetuate the myth that we can “manage” emissions rather than phase fossil fuels out. Instead of subsidizing such approaches, public funds should be directed toward measures that prevent further climate harm by rooting out its source: fossil fuel production and use. Governments must also support strict limits on geoengineering and advance a global non-use agreement. 

Moving Toward a Fossil-Free Ocean

The fossil fuel industry is increasingly turning to the ocean as a new frontier for oil and gas development, despite the legal and scientific imperative to phase out fossil fuels. Halting the expansion of offshore oil and gas — starting with an end to new licensing — is a necessary step for States to meet their legal obligations to prevent marine pollution and climate harm, as clarified by the International Tribunal for the Law of the Sea (ITLOS) and the ICJ.

Marine health is critical to ecological integrity, human rights, and climate stability. Protecting the ocean is vital for all life that depends on it. There can be no fossil-free future without a fossil-free ocean.

Cutting the Industry’s Lifeline 

Santa Marta needs to address drivers of fossil fuel supply and demand beyond energy — especially petrochemicals like those used in plastics and ammonia. As demand for fossil fuels declines in the energy and transport sectors, the fossil fuel industry is increasingly relying on petrochemicals to sustain growth. A credible transition requires that States halt petrochemical expansion — especially new plastics and ammonia infrastructure.

Financing the Transition

A just transition away from fossil fuels must be funded by those most responsible for the climate crisis. This means that the largest cumulative polluters act first and fastest to phase out fossil fuels, as well as provide adequate finance and support to low income countries, including debt relief, reparations, and contributions to address mounting loss and damage from climate change. Adequate funds are available if they are just allocated appropriately. Ending the subsidies that prop up the fossil economy, including financing and tax breaks for fossil fuel production and speculative technologies, and defunding militarization and war, would free up billions if not trillions in public finance that could be put toward a just transition.

Delivering a Just, Rights-Based Transition

To chart the path to a livable, fossil-free future for all, the discussions in Santa Marta must be grounded in the law, rooted in human rights, and responsive to demands for justice and accountability. That requires centering communities, honoring the leadership and knowledge of Indigenous Peoples, and listening to those on the frontlines of the climate crisis and the forefront of real climate solutions. The rapid and equitable transition away from fossil fuels will not be dictated from on high or administered top-down. To achieve transformational change, we must transform the way we make policy and take action, ensuring meaningful participation by those whose lives and livelihoods, histories and futures are on the line.  

Phasing out oil, gas, and coal is not just a scientific necessity and a legal obligation, it’s also an opportunity to break free from a destructive system. On the journey to a fossil-free future, Santa Marta can be a turning point where a ‘coalition of doers’ commits to a dedicated forum for coordinated action on fossil fuel phaseout, including a follow-on conference to begin negotiating a Fossil Fuel Treaty. Countries must cooperate effectively to leave oil, gas, and coal behind so that, together, we can walk the path ahead.