Climate Change Is Becoming a Monetary Policy Problem: Why Central Banks Must Rethink Price Stability in a Warming World

Climate change is often discussed as an environmental, energy, or financial stability issue, but its implications increasingly reach the heart of monetary policy itself. A new guide from the Network for Greening the Financial System (NGFS) focuses on how climate change and the transition toward cleaner energy systems can affect one of the most fundamental responsibilities of central banks: maintaining price stability. The core message is clear. Climate change is reshaping the economic environment in which monetary policy operates, and central banks need to understand those changes if they are to continue managing inflation effectively.

One of the most difficult challenges is that climate-related shocks can affect inflation and economic growth at the same time, and often in opposite directions. Extreme weather events such as floods, droughts, heatwaves, storms, and wildfires can disrupt agricultural production, damage infrastructure, reduce labor productivity, interrupt supply chains, and increase the costs of food, energy, insurance, and transportation. These disruptions can push prices higher even as economic activity slows. For central banks, this creates a particularly difficult situation because traditional monetary policy tools are usually designed to cool inflation by reducing demand, but climate-related inflation may originate primarily from supply constraints rather than excessive demand.

The transition away from fossil fuels can also create temporary price pressures. Shifting an economy toward renewable energy, electrified transport, energy-efficient buildings, and cleaner industrial processes requires substantial investment and structural change. Energy systems must be rebuilt, electricity grids expanded, new technologies deployed, and capital redirected away from carbon-intensive assets. During this transition, energy prices may fluctuate, investment patterns may shift, and some sectors may face higher adjustment costs. These developments can influence inflation even when the long-term objective of the transition is to create a cleaner, more resilient, and potentially less volatile energy system.

For central banks, the difficult question is not whether climate change matters for monetary policy, but how it changes the way inflation behaves. A drought that reduces food production, for example, can raise food prices without indicating that overall demand in the economy is excessive. Similarly, an energy supply shock can raise transportation and manufacturing costs throughout the economy while simultaneously weakening household purchasing power and slowing growth. Raising interest rates aggressively in response to every climate-related price increase could therefore impose unnecessary economic costs, while ignoring persistent climate-driven inflation could allow inflation expectations to become less stable. Monetary authorities must distinguish between temporary price shocks and more persistent changes in inflation dynamics.

The NGFS guide therefore emphasizes the importance of treating climate-related disturbances in much the same way central banks analyze other major economic shocks. Policymakers need to understand the source of the shock, estimate its impact on inflation and economic activity, evaluate how long those effects are likely to persist, and then determine the appropriate monetary policy response. There is no single interest-rate response that will be appropriate for every climate event. The correct response depends on the nature, scale, duration, and transmission channels of the shock.

Climate Change Can Alter How Interest Rates Affect the Economy

Climate change may also influence the transmission mechanism of monetary policy itself. Central banks typically change policy interest rates with the expectation that those changes will affect borrowing costs, investment, consumption, asset prices, credit conditions, and eventually inflation. But climate risks can alter these relationships. Businesses exposed to physical climate hazards may reduce investment even when borrowing costs fall. Households facing repeated disasters or rising insurance costs may behave differently from households in more stable environments. Banks may adjust lending standards if climate-related risks increase the probability of losses on mortgages, agricultural loans, or corporate lending.

This means that the same interest-rate change may have different economic effects depending on the level of climate risk in the economy. Monetary policy transmission could become more uncertain, more uneven across sectors, and potentially less predictable. A region repeatedly affected by floods, for example, may experience falling property values and tighter credit conditions even when national monetary policy is relatively accommodative. A sector undergoing rapid decarbonization may face rising financing costs because lenders perceive long-term transition risks. Central banks therefore need increasingly sophisticated analysis to understand how climate factors interact with financial markets and credit channels.

Climate Change May Affect the “Natural” Rate of Interest

Another important issue highlighted by the NGFS is the possibility that climate change could influence the economy’s natural rate of interest—the real interest rate consistent with stable inflation and an economy operating near its potential. This rate cannot be directly observed and is already difficult to estimate. Climate change adds another layer of uncertainty.

Physical climate damages could reduce productivity, destroy capital, disrupt labor markets, and weaken long-term economic growth. These effects could potentially influence savings and investment behavior, which are key determinants of the natural interest rate. At the same time, the energy transition may require enormous levels of investment in renewable generation, grids, storage, electric vehicles, industrial technologies, building efficiency, and climate-resilient infrastructure. Higher investment demand could affect equilibrium interest rates in a different direction.

The interaction between these forces is complex. Climate damages may suppress growth and investment in some parts of the economy, while transition-related investment may accelerate capital demand elsewhere. Demographic trends, productivity, fiscal policy, global savings patterns, and technological development will continue to matter as well. For central banks, this means that estimating the appropriate neutral policy stance may become even more challenging.

Extreme Weather Can Become an Inflation Shock

Consider a severe drought affecting an agricultural region. Crop production falls, food prices increase, rural incomes decline, and food-processing companies face higher input costs. Those higher costs may eventually reach supermarkets and restaurants. At the same time, households must spend a larger share of their income on food, leaving less money available for other purchases. Economic growth can weaken even while headline inflation rises.

A central bank facing this situation cannot produce more food by raising or lowering interest rates. Monetary policy cannot make rainfall return, repair damaged crops, or restore disrupted supply chains. However, it can influence whether the initial increase in prices spreads more broadly throughout the economy.

If workers and businesses begin expecting consistently higher inflation, wage demands and price-setting behavior may change. A temporary food-price shock could then contribute to more persistent inflation. This is where central banks must carefully assess second-round effects rather than simply responding mechanically to the first increase in prices.

Similar problems can occur after floods, storms, or wildfires. Infrastructure may need rebuilding, transportation routes can be interrupted, housing shortages may push rents higher, and reconstruction demand may raise the costs of building materials and labor. Climate shocks can therefore enter inflation through multiple channels at once.

The Energy Transition Can Create Both Short-Term Costs and Long-Term Stability

The shift toward cleaner energy also presents a complex monetary policy picture. In the short term, poorly managed or unexpectedly rapid changes in energy supply can create price volatility. Fossil fuel investment may decline before clean energy capacity is sufficient to replace it, or carbon pricing and regulatory changes may raise the cost of high-emission activities.

But the longer-term effects can look very different.

Renewable energy technologies such as solar and wind do not require continuous purchases of internationally traded fuel once installed. Electrification, energy efficiency, and diversified domestic clean-energy systems can potentially reduce an economy’s exposure to volatile fossil fuel markets. From a macroeconomic perspective, this could eventually change the way global energy shocks pass through to domestic inflation.

The challenge for policymakers is that the transition will not occur instantly. During the transformation, old and new energy systems will coexist, producing a period in which multiple sources of price volatility may operate simultaneously.

Uncertainty Becomes a Central Policy Challenge

Climate change increases uncertainty in economic forecasting.

Historical relationships may become less reliable when the frequency or intensity of extreme weather changes. Agricultural output may become more volatile. Insurance markets may adjust. Migration patterns may shift. Infrastructure may face increasingly frequent damage. Governments may need to spend more on disaster response and climate adaptation.

At the same time, technological change in the energy transition may proceed faster or slower than expected. Electric vehicles, renewable power, battery storage, hydrogen, carbon capture, and other technologies may develop at different speeds across countries and sectors.

Central banks therefore cannot rely solely on a single economic forecast.

Scenario analysis becomes increasingly important.

Policymakers may need to consider multiple possible futures: one in which climate action accelerates smoothly, another in which the transition is delayed and then becomes abrupt, and another in which physical climate damages become increasingly severe. Each scenario may generate different implications for inflation, growth, investment, employment, and financial conditions.

Central Banks Must Understand What They Can—and Cannot—Do

The NGFS also emphasizes the importance of clearly defining the role of central banks.

Central banks are not climate ministries.

They do not control land-use policy, energy regulations, building standards, public transport systems, carbon taxes, or national climate targets. Those responsibilities generally belong to elected governments and other public institutions.

Monetary policy also cannot directly stop a drought, build renewable power plants, restore forests, or redesign urban infrastructure.

But climate change can affect inflation, economic growth, financial conditions, and the transmission of monetary policy. Once climate change influences those variables, it becomes relevant to central banks because it affects their ability to fulfil their existing mandates.

This distinction is crucial.

Central banks do not need to become environmental policymakers in order to take climate change seriously. They need to understand climate change because ignoring economically relevant climate risks could weaken their ability to maintain price stability.

Communication Will Be Critical

Clear communication is therefore one of the most important recommendations.

The public needs to understand why climate-related shocks may affect inflation and why central banks may respond differently depending on the source of those shocks. Policymakers also need to explain the limits of monetary policy.

Suppose food inflation rises because extreme weather destroys crops. The public may expect the central bank to “solve” the inflation problem immediately. But interest rates cannot replace lost harvests. The central bank’s role is instead to prevent a temporary supply shock from becoming embedded in broader inflation dynamics while avoiding unnecessary damage to employment and economic activity.

Similarly, if energy prices rise during the transition, central banks need to explain whether the increase appears temporary, persistent, or likely to generate broader inflationary pressures.

Poor communication could create confusion about what monetary policy can realistically achieve. Clear communication can help anchor inflation expectations even when climate shocks make headline inflation volatile.

Central Banks Need Better Climate-Economic Data

Effective policy depends on effective measurement.

Traditional economic models may not fully capture how climate hazards affect production, household behavior, supply chains, labor productivity, insurance, property markets, and financial conditions. Central banks will increasingly need better data linking physical climate risks with economic outcomes.

This could include information on regional exposure to floods and heatwaves, sector-specific transition risks, energy-price sensitivity, agricultural production, insurance coverage, climate-related investment, and infrastructure vulnerability.

Better data can help central banks distinguish temporary disruptions from structural economic changes.

That distinction matters enormously for monetary policy.

A one-season crop failure requires a different response from a permanent decline in agricultural productivity.

A temporary spike in energy prices differs from a structural shift in the economy’s energy system.

A short-lived reconstruction boom differs from persistent climate-driven capital destruction.

Without good data, those differences can be difficult to identify.

Scenario Analysis Can Help Prepare for the Unexpected

One of the practical strengths of the NGFS approach is its emphasis on scenarios rather than pretending that the future can be predicted precisely.

Climate economics contains substantial uncertainty.

How quickly will emissions decline?

How severe will physical climate impacts become?

How fast will clean technologies be adopted?

How will governments design transition policies?

How will households and businesses respond?

Rather than relying on one deterministic forecast, scenarios allow central banks to examine how different combinations of physical and transition risks could affect their mandates.

A delayed transition, for example, may initially produce lower adjustment costs but ultimately require much faster policy changes later. A smooth transition may require significant investment today but reduce future physical climate damages. Severe physical warming scenarios may create repeated supply disruptions and productivity losses.

Understanding these pathways can help central banks test whether their analytical frameworks and policy tools remain effective.

Climate Change Could Make Inflation More Volatile

One long-term concern is that climate change could create an economy in which supply shocks occur more frequently.

Repeated droughts could affect food prices.

Heatwaves could reduce labor productivity.

Floods could disrupt manufacturing.

Storms could damage transportation infrastructure.

Energy transition bottlenecks could periodically affect commodity prices.

If such disruptions become more common, inflation may become inherently more volatile.

This does not necessarily mean that central banks should react aggressively to every price movement. In fact, frequent supply shocks may make it even more important to distinguish between temporary inflation and persistent underlying inflation.

The challenge will be maintaining confidence that inflation will return to target even when short-term volatility increases.

Climate Policy and Monetary Policy Must Remain Distinct but Connected

Governments ultimately determine the direction of climate policy through regulation, taxation, spending, infrastructure investment, and energy policy. Central banks operate within the economic environment those policies create.

Well-designed climate policy can potentially make the monetary policy challenge easier by providing predictable transition pathways.

Uncertain or abrupt policy changes can make it harder.

If businesses know how carbon prices, energy regulations, and infrastructure investment will evolve over time, they can plan investment accordingly. If policy changes arrive suddenly, adjustment costs and price volatility may be greater.

This means coordination of information and economic analysis is important, even while institutional mandates remain clearly separated.

Price Stability in a Warming World

The deepest message from the NGFS guide is that climate change should no longer be viewed as something occurring outside the traditional macroeconomic framework.

Climate change can influence food prices.

Energy prices.

Productivity.

Investment.

Employment.

Insurance.

Financial markets.

Government spending.

Potential economic growth.

And ultimately inflation.

All of these variables matter directly to monetary policy.

The central bank of the future therefore needs more than conventional inflation models. It needs the capacity to understand how physical climate risks and the transition to a low-carbon economy interact with the broader macroeconomy.

That does not mean central banks should attempt to solve climate change themselves.

It means they must ensure that climate change does not prevent them from doing their own job effectively.

In an increasingly uncertain climate, maintaining price stability may require stronger analytical capacity, better climate-economic data, more sophisticated scenario analysis, careful judgment about supply shocks, and much clearer communication with the public.

Climate change is not rewriting the fundamental mandate of central banks. It is changing the environment in which that mandate must be delivered.

The central challenge is therefore one of adaptation—not only adaptation of infrastructure, cities, or energy systems, but adaptation of economic policymaking itself.

Because in a warming world, understanding climate risk is increasingly becoming part of understanding inflation.

Source: Network for Greening the Financial System (NGFS)
https://www.linkedin.com/posts/ngfs-guide-for-central-banks-ugcPost-7513486673717043200-oODr/