ECB warns climate crisis and nature collapse threaten financial stability

Frank Elderson sits on the executive board of the European Central Bank, and he has begun to sound an alarm that most financial institutions have not yet fully absorbed: the collapse of nature itself is becoming a balance-sheet problem.

As wildfires tore across France and Spain in the summer of 2026, consuming homes and businesses under record-breaking heat, Elderson spoke to the Guardian about something less visible than the flames but potentially more consequential. The ECB, he explained, was ramping up its surveillance of what economists call ecosystem services—the water systems that power hydroelectric plants, the soil that feeds crops, the forests that stabilize climate, the marine habitats that sustain fisheries. These are not abstract environmental concerns. They are the natural infrastructure on which modern economies depend, and they are degrading rapidly.

"These services are not stable but they are in rapid decline," Elderson said. "That's why we talk about the climate and nature crises." The distinction matters. A single hurricane or flood is a discrete event that banks can model and price. The systematic unraveling of the natural systems that underpin production, transportation, food security, and energy generation is something else entirely—harder to quantify, harder to hedge against, and potentially more destabilizing to the financial system as a whole.

The ECB's role as supervisor of Europe's largest banks gives it unusual leverage. The central bank has launched a formal program to assess how ecosystem degradation could translate into credit losses across the eurozone's banking sector. Later in 2026, it planned to publish analysis examining what it calls "ecosystem degradation pathways"—essentially, the chain of causation from environmental collapse to financial risk. The work is not speculative. Elderson was explicit: nature-related risks "can pose material economic and financial risks, including through their impacts on credit risk, growth, inflation and—over the long-term—potential financial instability."

Elderson himself has been instrumental in building the institutional architecture for this kind of thinking. In 2017, alongside Mark Carney of the Bank of England and François Villeroy de Galhau of the Banque de France, he helped create the Network for Greening the Financial System, a coalition of 114 central banks and financial supervisors committed to developing climate risk management frameworks. He served as the network's founding chair. The work has been contentious, particularly in the United States, where the Trump administration withdrew from the NGFS in 2025, leaving Europe to lead the effort without the world's largest economy.

Yet Elderson expressed confidence that the banking industry itself understands the stakes. "I would think it's very difficult to find a bank in Europe that will honestly tell you that they think this is not relevant," he said. "I think that time has passed." The shift reflects a recognition that climate and nature-related risks are not peripheral concerns for financial institutions—they are central to the stability of the system itself. A bank that finances agriculture in a region where water systems are collapsing faces real credit risk. A bank with exposure to coastal real estate faces rising losses from flooding. A bank dependent on supply chains that rely on ecosystem services faces disruption and default.

What makes Elderson's intervention significant is not that he is saying something new—environmental economists have been making these arguments for years—but that he is saying it from inside the machinery of financial regulation. The ECB does not issue warnings lightly. When it does, banks listen. The message is clear: the age of treating climate and nature as externalities, as problems for governments and NGOs to solve, is over. They are now financial stability issues, which means they are central bank issues, which means they are everyone's problem.