The Planet’s Savings Account

The World Meteorological Organization’s State of Global Water Resources 2025 has just reported that 2025 was one of the three driest years for global river discharge in 35 years. More than 36 per cent of the world’s basin area experienced below-normal flows. For the seventh year running, rivers behaving normally were in a clear minority. Nearly two-thirds of monitored groundwater wells sat outside their historical range, with the balance shifting further towards deficit rather than recovery.

Beneath those annual flows, the reserves are also shrinking. The water stored across the land in aquifers, lakes, rivers, soil, vegetation, snow and ice has been declining since the middle of the last decade. Every major glaciated region lost ice in 2025 for the fourth consecutive year. Over the three years to 2025, glaciers lost around 1,400 billion tonnes of it.

The WMO calls these slower reserves the planet’s savings account. That phrase is more than a metaphor. Rainfall is income. Aquifers, glaciers, lakes, wetlands and healthy soils are capital. They accumulate water, hold it, clean it and release it when the weather fails to provide what farms, power stations, factories and cities require.

We have mistaken the withdrawals for income, ignored the falling balance and continued spending. The taps still run, crops are still sold and electricity is still generated, so the economy records production. Only when a river becomes unnavigable, a well runs dry or a reservoir can no longer turn its turbines does the missing capital finally enter the financial account.

A dry river is not the beginning of the crisis. It is the moment the crisis can no longer be hidden.

Living off the buffer

Most people understand the distinction instinctively in their own finances. A household living on the interest from its savings may be able to sustain its spending. A household maintaining the same lifestyle by consuming the principal may look equally comfortable for a while, but it is becoming poorer with every payment.

The danger is familiar in Britain. The Financial Conduct Authority found that one in ten adults had no cash savings at all, while another 21 per cent had less than £1,000 available for an emergency. One quarter had low financial resilience. Income may keep a household functioning from month to month, but without a buffer, one interruption becomes a crisis.

Water allows an economy to perform the same trick on a much larger scale. A farmer can survive a dry season by pumping groundwater accumulated over decades or centuries. A city can maintain supply by drawing a reservoir lower. Hydropower can continue generating by releasing stored water. Agriculture can expand by draining a wetland or taking more from a river than the catchment can reliably replace.

In each case, present production is maintained by drawing down the asset supporting future production. Yet the crop still appears as agricultural output, the electricity as energy output and the water bill as company revenue. The depletion of the aquifer, reservoir, wetland or catchment may appear nowhere with comparable force. We record the benefit as income while leaving the loss off the balance sheet.

For a surprisingly long time, the remaining stock conceals what is happening. Wells are deepened, reservoirs are drawn lower, water is transferred from another basin and governments subsidise food, energy or emergency supply. Each intervention buys time. It also permits more houses, businesses, debts and public promises to be built around a level of water security that is quietly disappearing.

That is why the WMO’s findings matter beyond hydrology. The report is not simply saying that 2025 was dry. It is saying that the systems which turn unreliable weather into reliable economic capacity are weakening. The buffer is becoming the economy, and the economy is consuming it.

When water re-enters the price

The separation lasts only until the physical system forces a reckoning. Water then returns to the economy through the prices and losses that conventional accounts do recognise.

Lower soil moisture and irrigation reduce harvests, raising food prices. Falling reservoirs weaken hydropower and force grids towards more expensive or carbon-intensive generation. Low rivers constrain shipping and industrial cooling. Falling groundwater raises pumping costs and strands wells. Insurers reprice risk, banks reconsider collateral and governments are expected to repair the damage, protect households and rescue businesses whose plans assumed the water would remain available.

The sequence is already visible. When drought pushed Gatún Lake to exceptionally low levels, the Panama Canal restricted daily transits, disrupting one of the world’s most important trade routes. In 2023, drought contributed to a global hydropower shortfall of more than 100 terawatt-hours. Replacing much of that lost generation with fossil fuels accounted for more than 40 per cent of the year’s increase in energy-related emissions.

The financial economy can therefore ignore a weakening water system, but it cannot escape dependence upon it. Farms are valued against future harvests. Power stations are financed against future electricity sales. Property values assume functioning infrastructure and insurable places. Government debt ultimately rests upon a productive tax base. All of those claims can continue rising while the water capital supporting them falls.

Then comes the forced reattachment. What appears to be a sudden inflation shock, insurance crisis, debt problem or demand upon the public finances is often the delayed recognition of a physical liability accumulated over many years. Nature presents the invoice late, but it does present it.

The account beneath the pipes

Earlier this year, Route2 asked who would rebuild Britain’s water system. The argument was that nationalisation may be justified, but changing who owns the water companies is not the same as restoring the system on which clean and secure water depends. The pipes, reservoirs and treatment works matter. So do the rivers, aquifers, wetlands, catchments, engineers, institutions, knowledge and public trust beneath them.

The latest WMO report takes that argument one level deeper. A water company can maintain and finance its network only if there remains a viable resource to collect, treat and distribute. Ownership of the operator is not ownership of the rain, the river or the ecological processes that replenish and purify them. The company operates a route into a shared natural asset; it did not create the asset itself.

Our accounts struggle with this distinction. Company accounts record revenues, operating costs, debt, dividends and expenditure on infrastructure. National accounts record the crops, electricity, industrial output and consumption enabled by water. Both become particularly busy after failure: boreholes are drilled, water is transported, damaged infrastructure repaired, crops replaced and households compensated. Much of this activity adds to GDP.

What neither account captures adequately is the changing productive position underneath. Has the aquifer recharged or been mined? Is the soil better able to retain water? Is the wetland continuing to regulate floods and drought? Is the catchment becoming more resilient, or are we maintaining this year’s output by reducing the capacity available next year?

The omission creates an extraordinary result. Depleting water can increase measured income. Responding to the damage can increase measured activity again. The loss of the asset connecting those two events remains largely invisible.

Financial reporting should not be blamed for failing to perform a function it was never designed to perform. The mistake is allowing it to become the only account that governs serious decisions. If a company, city or country cannot distinguish renewable water income from the liquidation of water capital, its reported performance is incomplete.

Green words, missing machinery

The Green Party provided an unusually neat demonstration of this problem at its conference. It declared nature to be critical national infrastructure, proposed returning water to public ownership and called for economic governance to recognise that prosperity depends upon healthy natural systems. There is plenty in that diagnosis with which to agree.

But declaring nature to be infrastructure does not create an account of its condition. Public ownership does not replenish an aquifer. Rights of Nature do not establish how much water can be abstracted, by whom, at what time or at whose expense. Criminalising ‘ecocide’ does not distinguish sustainable use from the gradual depletion produced by millions of individually lawful decisions. Nationalisation changes the shareholder. It does not, by itself, create ecological competence.

At the same conference, 1,022 members voted to make the party formally anti-Zionist, declaring Zionism a form of racism and supporting a single state across historic Palestine. The motion generated exactly what contemporary politics rewards: a morally absolute slogan, a contest over identity and days of attention. The difficult ecological work was buried almost immediately beneath the argument.

That contrast is not incidental to a water essay. It is the signal problem in miniature. Measuring natural assets, establishing defensible limits, reconciling competing claims and financing restoration require patient work and imperfect choices. A slogan provides recognition, affiliation and applause. Complexity struggles for attention; moral certainty travels quickly.

A genuinely green politics would be judged by whether it can keep rivers flowing, aquifers viable, food systems productive and people secure without transferring the cost to somebody else or to the future. It would build the accounts, institutions and investment mechanisms capable of governing a common inheritance. Nationalising the pipes while leaving the underlying asset unmeasured is not ecological economics. It is a change of ownership over the machinery of depletion.

A serious green leader would make the condition of the country’s natural foundations politically visible. They would explain the difficult trade-offs between consumption, resilience, affordability and restoration; distinguish ownership from competence; build institutions capable of acting beyond the electoral cycle; and judge success by whether natural assets were stronger when they left office than when they arrived.

They would also resist the easy politics of selective moral certainty. Environmental leadership should be grounded in universal principles: the same concern for human life, the same resistance to racism and the same respect for national self-determination, whoever is involved. Turning one of the world’s most complex conflicts into a slogan does not demonstrate moral courage. It demonstrates the political economics of attention.

Zack Polanski’s Green Party currently offers almost the inverse: maximal confidence about questions over which it has little practical authority, and remarkably little machinery for governing the natural systems from which its name derives.

Stop spending the principal

A useful water balance sheet would begin with a position. What water stocks exist? In what quantity and condition? How quickly are they replenished? Which people, ecosystems and productive activities depend upon them? What claims have already been placed upon the stock, and how will those claims change under plausible future conditions?

It would then record movements. Rainfall, recharge, restored wetlands, healthier soil and reduced leakage may strengthen the position. Abstraction, pollution, drainage, erosion and ecological degradation weaken either the quantity of water or the system’s capacity to store, clean and release it. Infrastructure can increase usable supply through storage, transfer, desalination or reuse, but only by recognising the energy, ecological and financial costs involved.

The closing position would tell us what remains. It would distinguish a temporary reduction in annual flow from an enduring loss of capacity, and renewable use from the liquidation of an inherited stock. Physical measures must come first. Monetary valuation can then connect changes in condition to production, risk, investment and public choices without pretending that one price captures the full meaning of a river or aquifer.

Once the position is visible, the response becomes practical. Abstraction rights can be tied to recharge and ecological condition rather than historical entitlement. Development can be tested against the capacity of its basin. Banks can examine water dependency alongside cash flow and collateral. Investment in wetlands, soil, leakage reduction, recycling and catchment restoration can be recognised as the maintenance of productive infrastructure rather than decorative environmental spending.

Markets still have a role. Prices can expose scarcity and reward innovation. Farmers, utilities, communities and technology providers should be free to find better ways of using, restoring and expanding available capacity. But a price cannot protect an asset if the total claim upon it remains physically impossible. Government must establish the condition of the common resource, define legitimate boundaries, protect essential needs and ensure that costs cannot simply be passed downstream or forward in time.

This is the connection between the WMO’s news and the wider Route2 argument. Financial activity is not the same as productive performance. Productive performance cannot be separated from the condition of the capital that makes it possible. When the two diverge, incomplete accounts allow the illusion to persist until the physical world forces them back together.

A political party that can define Zionism more confidently than it can define the condition of an aquifer has lost sight of what being green requires. The measure of environmental leadership is not the radicalism of its resolutions, but the condition of the assets left behind.

We have mistaken water income for water wealth and spent both. The world’s rivers are now beginning to show the balance.

The planet’s savings account exists. It is time we learned to keep it.

Sources and methodological notes

- World Meteorological Organization, State of Global Water Resources 2025

- World Meteorological Organization, Recent water trends have serious future implications

- International Energy Agency, Hydropower

- Panama Canal Authority, The 2023 drought and Gatún Lake

- Green Party, No national security without nature security

- Green Party, Green Party adopts anti-Zionist policy

- Reuters, UK Green Party declares Zionism is racism

- Financial Conduct Authority, Financial Lives 2024: key findings

- Route2, Who Will Rebuild Britain’s Water System?

Method note: Global estimates combine observations, satellites and hydrological models. Conditions vary between basins; global decline does not mean uniform drying everywhere.

This essay began as a line of enquiry developed through the work on Value2Society. ChatGPT was used as a thinking and editorial partner, testing the argument, challenging its edges and helping shape it for publication.