War, trade, and the future of carbon credits

As energy markets remain volatile amid the prolonged conflict in the Middle East, governments are confronting a difficult reality. The same geopolitical tensions driving concerns about oil supplies, shipping routes, and economic security are also emerging at a critical moment for global climate policy.

One of the most significant developments in climate finance over the past decade has been the rapid growth of carbon markets. Designed to channel investment toward emissions reductions, these systems have evolved from relatively niche policy tools into a growing component of the global financial system. According to the World Bank's State and Trends of Carbon Pricing 2026 report, government programs that charge companies for their carbon emissions generated a record $107 billion in public revenue in 2025. The report found that 87 such programs are now operating worldwide, covering 29 percent of global greenhouse gas emissions, nearly triple the share covered a decade ago.

Alongside these government-backed systems, voluntary carbon credit markets continue to attract growing interest from businesses seeking to meet climate commitments. According to global tech firm Carbon Direct, spending on voluntary carbon credits reached approximately $1.04 billion in 2025. Yet as policymakers seek to build more integrated international carbon trading systems, they face a difficult challenge. Carbon markets depend on many of the same conditions that support global trade, including trust, transparency, and cross-border cooperation. At a time when war, sanctions, and geopolitical rivalry are placing greater strain on the international system, questions are emerging about whether carbon credits can truly become a global climate finance network.

From climate policy to climate finance

At its core, carbon pricing is designed to make pollution more expensive. Governments typically accomplish this through carbon taxes or emissions trading systems that require companies to pay for the greenhouse gases they emit. The objective is to encourage businesses and investors to reduce emissions while creating economic incentives for cleaner technologies and production methods.

Carbon credits operate somewhat differently. Rather than charging directly for emissions, they represent verified reductions or removals of greenhouse gases elsewhere. A company may purchase credits generated through activities such as reforestation projects, methane capture initiatives, or renewable energy investments to compensate for emissions that cannot yet be eliminated from its own operations.

Supporters argue that these systems can direct investment toward emissions reductions wherever they can be achieved most efficiently. Analysis from the British think tank Tony Blair Institute suggests that well-functioning international carbon markets could lower the cost of achieving global climate goals by enabling countries and companies to pursue emissions reductions wherever they can be achieved most efficiently. For developing economies, this can create access to climate finance that might otherwise be unavailable through traditional public funding mechanisms.

This logic is driving growing interest in market integration. Policymakers are exploring ways to connect carbon markets through common accounting standards, shared registries, and cross-border trading mechanisms. A 2026 Brookings Institution analysis argued that linking carbon markets can make climate investments more efficient, lower costs, and make it easier for governments to meet their emissions goals.

War and the politics of cooperation

The challenge is that carbon markets do not exist separately from broader geopolitical developments.

The 2026 war in the Middle East has highlighted how quickly energy security concerns can move ahead of longer-term climate objectives. Disruptions to regional energy markets, threats to maritime trade routes, and uncertainty surrounding global fuel supplies have prompted governments to focus on economic stability and energy resilience.

In some respects, this environment may strengthen interest in carbon markets. Volatile energy prices can increase the financial risks associated with fossil fuel dependence, while corporations continue facing pressure from investors, regulators, and consumers to demonstrate progress on climate commitments. Carbon credits can provide a relatively flexible mechanism for addressing emissions while broader energy systems undergo transition.

Yet the expansion of international carbon markets depends on trust at multiple levels. Cross-border carbon trading requires governments to agree on shared rules for how emissions reductions are recorded, verified, and exchanged between countries. Those requirements become more difficult to maintain when trade tensions, sanctions, and strategic competition become more common features of the international economy.

A 2025 study published in Nature Climate Action, a peer-reviewed climate science journal, emphasized that governance quality remains central to the long-term success of international carbon markets.As trading expands across borders, reliable monitoring systems, transparent accounting standards, and strong oversight mechanisms become increasingly important.

A system designed around international cooperation ultimately depends on governments remaining willing to cooperate. Without confidence in the integrity of the credits being traded, market expansion alone is unlikely to attract sustained investment.

A test for global climate cooperation

Despite these challenges, supporters argue that carbon markets remain one of the few areas where international cooperation continues to offer clear economic benefits for all participants.

In a 2026 report, the Voluntary Carbon Markets Integrity Initiative, a nonprofit organization that develops standards and guidance for carbon credit markets, argued that carbon markets could serve as a practical platform for climate cooperation at a time when many other forms of international collaboration are under pressure. Unlike traditional aid programs, carbon markets create financial incentives for both buyers and sellers, linking emissions reductions directly to investment and economic opportunity.

Whether that vision becomes reality remains uncertain. The future of carbon credits will depend not only on climate policy but also on broader geopolitical trends. If governments continue moving toward economic fragmentation and strategic competition, building integrated international markets may become more difficult. If climate cooperation remains politically viable despite growing tensions elsewhere, carbon credits could emerge as an important mechanism for financing emissions reductions worldwide.