There is a particular kind of violence that arrives not with gunfire but with silence — the silence of a dry riverbed, the quietness of an empty grain store, the invisible hum of a planet warming itself out of the conditions that made human civilization possible. In the spring of 2026, the world's population stands at roughly 8.2 billion people, each needing on average between 2,000 and 2,500 calories of food and dozens of litres of clean water every single day. The planet has, in principle, the raw capacity to meet those needs. But that capacity is being eroded from multiple directions at once, in ways that interact and amplify each other, and the window to course-correct is narrowing in ways that policymakers are only beginning to grasp.
The statistical picture is arresting. According to the 2025 State of Food Security and Nutrition in the World (SOFI) report, jointly published by the FAO, IFAD, UNICEF, WFP and WHO, an estimated 673 million people faced hunger in 2024, representing 8.3 percent of the global population. The 2025 Global Report on Food Crises, released by the International Food Policy Research Institute, found that 295.3 million people across 53 countries faced acute food insecurity in 2024 — a tripling of the figure recorded as recently as 2016, and a doubling from the pre-pandemic level of 2020. On the water side, the WHO and UNICEF's August 2025 joint assessment revealed that one in four people — approximately 2.1 billion — still lack access to safely managed drinking water, with 3.4 billion lacking safe sanitation services. These are not numbers from a distant past or a dystopian future. They describe the world right now.
To understand how this happened — and why it is getting harder, not easier, to fix — it helps to understand the three converging forces that are at the heart of the crisis. The first is demography. The United Nations World Population Prospects projects that the global population will rise from 8.2 billion today to approximately 10.3 billion by the 2080s — a 26 percent increase in the number of mouths to feed. Most of that growth will happen in sub-Saharan Africa and parts of South Asia, precisely the regions that are already most food-insecure and most water-stressed. The mathematics of feeding such a population without radically changing how food is produced, distributed, and consumed are simply daunting. The second force is climate change. The third is governance — the chronic failure of institutions, both domestic and international, to manage shared resources equitably and with foresight. Each of these forces is serious on its own. Together, they form a polycrisis that is more dangerous than the sum of its parts.
The world is not running out of food because there isn't enough. It is running out of the conditions — stable climate, reliable rainfall, intact soils — that make food production predictable.
Climate change's impact on agriculture is now better quantified than at any point in scientific history. A landmark study published in Nature in June 2025, drawing on data from over 12,000 growing regions across 55 countries, found that global production of staple crop calories declines by 4.4 percent of recommended human consumption for every single degree Celsius of warming — equivalent to roughly 120 calories per person per day. That is the nutritional equivalent of skipping breakfast, permanently, as temperatures rise. In a high-emissions scenario, global yields of staple crops are projected to be 24 percent lower in 2100 than they would otherwise be, even accounting for farmer adaptation. Yield losses in the wealthiest agricultural regions could average 41 percent, with the US Corn Belt, so long the world's reliable breadbasket, projected to be among the hardest hit.
These projections align with regional data that is already materializing. In sub-Saharan Africa, staple crop yields are projected to fall by 10 to 20 percent by 2050 under current climate trajectories, threatening the food security of hundreds of millions of smallholder farmers who have almost no financial cushion against crop failure. In South Asia, rice and wheat production could decline by 10 to 15 percent by mid-century due to heat stress and shifting monsoon patterns. In East Africa, wheat yields have already fallen by up to 25 percent in certain areas over the past two decades. And Africa is where population growth will be most intense. According to the 2025 UN FAO High Level Panel of Experts report, agricultural productivity across Africa has already declined by 34 percent since 1961, largely due to climate variability. The continent that will add the most people is adding them to the land that has already lost the most agricultural capacity.
Water is, in a very real sense, the master variable of the food security equation. Roughly 70 percent of all freshwater withdrawn globally goes to agriculture. Without water, there is no irrigation; without irrigation, there is no reliable food production in the parts of the world that need it most. And the water situation is worsening on a trajectory that parallels the food emergency — in some ways it is the food emergency seen from a different angle. UN-Water estimates that approximately 4 billion people — nearly two-thirds of the global population — already experience severe water scarcity for at least one month each year. By 2050, three out of four people on Earth could face drought impacts. Current drought costs already exceed $307 billion annually. And the hydrological cycle itself is destabilizing in ways not seen before in the modern era; as the World Meteorological Organization's Secretary-General noted in 2024, for the first time in human history, the global water cycle is out of balance.
The UN SDG progress report for 2025 confirms that none of the SDG 6 targets — which concern clean water and sanitation for all — are on track. In 2024, 3.4 billion people lacked safely managed sanitation and 1.7 billion lacked basic hygiene services at home. Some 646 million children remain in schools without basic hygiene services, requiring a fourfold increase in the current pace of improvement to meet 2030 targets. Three in every five people without any hygiene facility live in sub-Saharan Africa. Women and girls bear a disproportionate share of this burden: globally, women and girls spend 200 million hours every day collecting water, time that could otherwise go toward education, economic productivity, or rest.
The geography of water stress maps almost perfectly onto the geography of food insecurity, and both map almost perfectly onto the geography of political instability. In the Lake Chad basin, the lake has shrunk by approximately 90 percent since the 1960s, devastating the livelihoods of around 30 million people who depend on it for farming and fishing. In the Tigris-Euphrates basin, Euphrates River flows into Syria have declined dramatically due to upstream damming in Turkey and reduced snowmelt from warming highlands, contributing to the agricultural collapse that preceded and deepened the Syrian civil war. The Center for Climate and Security's 2025 review of the SOFI report explicitly identifies water and food stress as compounding factors in conflicts across sub-Saharan Africa, the Horn of Africa, and the Middle East. Food insecurity and water stress do not cause conflict in a simple, mechanistic way — but they reliably widen existing fractures.
The SOFI report's 2025 data contains a finding that ought to be scandalous but has passed largely unremarked in mainstream discourse: while the global prevalence of hunger fell marginally from 8.5 percent in 2023 to 8.2 percent in 2024, this aggregate figure conceals a deeply troubling regional divergence. In South-Eastern Asia, Southern Asia, and Latin America, undernourishment rates dropped. In Africa, hunger rose across the entire continent except Eastern Africa. More than one in five people in Africa now face chronic hunger. If current trends continue, 512 million people could still face hunger in 2030 — the year by which the world promised to eliminate it as a Sustainable Development Goal — and nearly 60 percent of them will be in Africa. The SDG 2 target of Zero Hunger is not being missed by a small margin. It is being missed by hundreds of millions of people.
The 2025 report also documented that 2.6 billion people could not afford a healthy diet in 2024. This is a different and often underappreciated dimension of food insecurity. Globally, food price inflation has consistently outpaced overall inflation since 2020; in January 2023, global food price inflation peaked at 13.6 percent, more than five percentage points above headline inflation. When the cheapest calories available are ultra-processed and nutritionally poor, entire populations become simultaneously over-fed in calories and malnourished in vitamins, minerals, and micronutrients — a condition known as the double burden of malnutrition that now afflicts countries at almost every income level. The SOFI report also noted, pointedly, that gendered gaps in food security and nutrition increased between 2023 and 2024, with women and girls disproportionately affected — reflecting longstanding inequalities in resource access, decision-making power, and social protection.
Underneath the food insecurity numbers lies a structural problem with global food systems that goes beyond climate: the extraordinary concentration of food production and trade in a small number of countries and commodity chains. Just a handful of nations — the United States, Brazil, Argentina, Canada, Australia — account for the vast majority of global grain and oilseed exports. Just a small number of crop varieties — wheat, rice, maize, soy — supply the overwhelming majority of global calories. This concentration creates fragility. When Russia and Ukraine, which together supplied approximately 30 percent of the world's wheat exports before 2022, went to war, global food prices spiked almost instantly, triggering political crises from Egypt to Sri Lanka. The system has essentially no slack — no redundancy, no reserves deep enough to absorb a major simultaneous shock in more than one breadbasket at a time.
By 2050, feeding 10 billion people will require an estimated 60 percent increase in global agricultural production — achieved on less land, with less water, in a less stable climate.
The picture painted above is serious, but it is not hopeless — and this distinction matters enormously. The world has solved seemingly intractable agricultural challenges before. The Green Revolution of the 1960s and 1970s more than doubled grain yields through the combination of improved seed varieties, synthetic fertilizer, and irrigation expansion, averting the mass famines that many demographers predicted. A new transformation — sometimes called the Doubly Green Revolution or the sustainable food transition — is now technologically within reach, though it will require a scale of political will and investment that has not yet materialized.
Precision agriculture is one of the most promising avenues. By combining satellite imagery, soil sensors, IoT-connected equipment, and artificial intelligence, precision farming systems can reduce water use by 30 to 50 percent while maintaining or increasing yields. The World Economic Forum's Global Futures Council has highlighted how AI-driven decision tools can help farmers optimize inputs — knowing exactly when, where, and how much water or fertilizer to apply — transforming the blunt instrument of conventional agriculture into something far more efficient. Companies like Netafim, whose GrowSphere system launched in 2024, are deploying precision irrigation and fertigation platforms that automate what previously required expensive agronomic expertise, bringing the benefits of data-driven farming to smallholder producers. The potential is real: researchers at MIT's environmental engineering department are actively working on plant-water relations, predictive climate modelling, and biodegradable precision delivery systems for pesticides and fertilizers, pointing toward an agriculture that wastes far less and respects the natural systems it depends on.
Israel, despite its arid Mediterranean climate, has become a global model for water security. The country now recycles nearly 90 percent of its wastewater for agricultural use — the highest rate in the world — and its drip irrigation technologies, developed over decades, are now deployed in farming operations across more than 110 countries. Singapore offers a complementary example: through a combination of water importation, wastewater recycling (its so-called NEWater), rainwater harvesting, and desalination, it has built a water-secure system on an island with almost no natural freshwater resources. These are not utopian experiments. They are working models that can be adapted and scaled.
Desalination technology has historically been criticized as too expensive and too energy-intensive to form a significant part of the global water security solution. But that calculation is shifting. Solar-powered desalination plants are becoming cost-competitive across the Middle East, North Africa, and coastal arid zones, with analysts projecting that renewable-energy-driven desalination could provide up to 40 percent more irrigation water for desert agriculture by 2030. Advances in membrane technology, brine management, and process efficiency are steadily bringing down both the cost and the carbon footprint of desalinated water. The constraint is no longer purely technological; it is financial and political.
Equally important is reducing food loss and waste, which represents perhaps the most underutilized lever in global food security. The FAO estimates that approximately one-third of all food produced globally — around 1.3 billion tonnes annually — is lost or wasted before it reaches a human mouth. In high-income countries, most of this waste occurs at the consumer end: food bought and discarded. In low-income countries, it occurs at the harvest, storage, and transport ends, where inadequate infrastructure, unreliable cold chains, and poor market access mean that harvests spoil before they can be sold. Addressing post-harvest losses in sub-Saharan Africa alone could dramatically improve food access for tens of millions of people without planting a single additional acre.
Technology and innovation matter enormously, but they cannot substitute for governance. The most technically sophisticated desalination plant does nothing if there is no institution capable of distributing its output equitably. The most precise satellite-guided irrigation system helps nothing if the farmer who needs it cannot access credit or land tenure security. Much of the global food and water security challenge is not a problem of insufficient knowledge or inadequate technology; it is a problem of insufficient political will, regulatory capacity, and institutional trust.
The governance dimension is visible in the global response to the humanitarian aid crisis that underlies food insecurity. The 2025 Global Report on Food Crises explicitly linked reductions in official development assistance to worsening acute hunger. The dissolution of USAID's development programs — one of the largest bilateral food security funding mechanisms in the world — has already sent reverberations through fragile food systems in East Africa and the Sahel. At a moment when humanitarian need is at a historic high, the international financing architecture for addressing it is contracting. Sudan, the Gaza Strip, South Sudan, Haiti, and Mali all saw populations reach IPC Phase 5 — Catastrophe-level food insecurity — in 2024, with numbers more than doubling from 2023. These are places where governance has collapsed or been deliberately dismantled, and where no amount of agricultural innovation can fill the void that institutional failure creates.
International water governance presents its own profound challenges. Freshwater does not respect political borders. More than 60 percent of the world's freshwater flows through shared transboundary basins — the Nile, the Mekong, the Indus, the Amazon, the Colorado — yet the international legal frameworks for managing these shared resources are weak, fragmented, and widely violated. Upstream countries can dam rivers, divert flows, and exhaust aquifers in ways that severely harm downstream neighbors with near impunity. As climate change intensifies competition over diminishing flows, the potential for water to become a vector of conflict — between communities, between regions, between nations — is growing. The UN-Water 2024 update on water stress levels found that approximately 10 percent of the global population already lives in countries with high and critical water stress, and the figure is rising.
The research community is increasingly converging on the concept of the food-water-energy nexus as the correct framework for understanding these challenges. Agriculture consumes 70 percent of freshwater; it also accounts for approximately 26 percent of global greenhouse gas emissions. Water treatment and distribution consume enormous amounts of energy; so does food production and cold-chain logistics. Solutions designed in isolation — boosting food production without regard to water use, expanding water supply without decarbonizing energy, growing energy crops on land needed for food — risk solving one dimension of the crisis while worsening another. What is needed, and what is only partially emerging, is an integrated systems approach that treats food, water, energy, and biodiversity as deeply interlinked and manages them accordingly.
Regenerative agriculture offers a partial template. Unlike conventional industrial farming, which treats soil primarily as an inert medium for chemical inputs, regenerative approaches treat soil as a living ecosystem whose health is the foundation of long-term productivity. Cover crops, reduced tillage, composting, agroforestry, and rotational grazing can all restore soil organic matter, improve water retention, reduce erosion, and sequester carbon simultaneously. Healthy soils act as a sponge — holding rainfall longer, releasing it more slowly, buffering crops against both drought and flood. Research published in peer-reviewed food science literature underscores that sustainable farming transitions can maintain and in some cases improve yields while dramatically reducing the environmental footprint of production. The challenge is making these transitions economically viable for the farmers who need to make them.
There is a moral dimension to all of this that economics and policy science alone cannot capture. The people most at risk from food and water insecurity are, overwhelmingly, those who contributed least to the conditions that created the crisis. Sub-Saharan African nations — where hunger is rising fastest, where agricultural productivity is declining most sharply, and where water stress is most acute — are responsible for a tiny fraction of the cumulative greenhouse gas emissions that are destabilizing the climate systems on which their farming depends. The billion-plus people living in the world's most water-stressed agricultural areas have in most cases never owned a car, taken a long-haul flight, or purchased anything that came wrapped in plastic. The injustice is structural and historic, and no honest reckoning with global food and water security can avoid it.
It also means that the solutions cannot be purely technocratic. A new seed variety or a more efficient irrigation system is valuable, but it does not address the underlying inequality of access, finance, and political voice that determines who benefits from innovation and who is left behind. The populations most at risk need not just technology transfer but land security, market access, climate finance, debt relief, and political representation — conditions that are at least as much about international economic relationships and domestic governance as they are about agronomy or hydrology.
The trajectory of the next two decades will be determined by choices being made now, in agricultural ministries and central banks and climate negotiating rooms, in corporate boardrooms and in the fields of smallholder farmers who grow the food that feeds much of the world. The science is clear: the window for preventing the worst outcomes — mass hunger on a scale not seen in the modern era, water conflicts that destabilize entire regions, an agricultural system unable to feed 10 billion people — remains open, but it is closing. What fills it is still, at this moment, a matter of political and moral choice. That may be the most important thing to understand about the twin crises of food and water: they are not acts of nature. They are the accumulation of human decisions. And they can, therefore, be changed by human decisions too.
Sources referenced in this article include the FAO/UNICEF SOFI 2025 Report, the 2025 Global Report on Food Crises, the WHO/UNICEF JMP 2025 Water Report, Hultgren et al., Nature (2025), the UN-Water Scarcity Data Portal, the Springer Sustainability Science journal (2026), and the PMC review on climate change and agricultural productivity (2025).
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