Several critical resources face serious depletion by 2050, though “running out” looks different depending on the resource. Some, like phosphorus and copper, won’t vanish entirely but will fall short of demand in ways that disrupt food systems, technology, and daily life. Others, like certain fish populations, face functional collapse. Here’s what the data actually shows for each major resource on a 2050 timeline.
Phosphorus: The Invisible Food Crisis
Phosphorus is one of the three essential nutrients in fertilizer, and there is no substitute for it. Every food crop on Earth depends on it. Unlike nitrogen, which can be pulled from the atmosphere, phosphorus comes almost entirely from mining a finite supply of phosphate rock concentrated in just a handful of countries, with Morocco controlling roughly 70% of known reserves.
Global phosphate supply is projected to fall below global demand by 2040. To keep pace with the food needs of a growing population, phosphate rock production would need to double by 2050 compared to current levels. That’s an enormous scaling challenge for an industry already straining to meet today’s requirements. The concern isn’t that phosphorus disappears from the planet, but that affordable, accessible supply dries up, making fertilizer more expensive and food production less reliable, particularly in regions that import most of their phosphate.
Freshwater Shortages Will Double
Freshwater isn’t disappearing globally, but usable freshwater in the right places at the right times is becoming critically scarce. The number of urban residents facing water scarcity is projected to double from 930 million in 2016 to between 1.7 and 2.4 billion people by 2050, according to the UN World Water Development Report. That’s roughly one in four people on Earth living in a city without reliable access to water.
The drivers are straightforward: population growth, urbanization, agricultural demand, and climate change are all pulling in the same direction. Groundwater aquifers that took thousands of years to fill are being drained in decades. Rivers that supply major cities are shrinking. This won’t look like taps going dry overnight in most places. It will look like rationing, higher water prices, crop failures in dry regions, and growing conflict over shared water sources.
Copper Can’t Keep Up With Demand
Copper sits at the center of nearly every major economic trend: electric vehicles, renewable energy, data centers, air conditioning, and defense systems all require enormous amounts of it. The problem is that mining output is not projected to keep pace. Baseline demand is expected to reach 37.1 million metric tons per year by 2050, but production from existing and planned mines may actually decline from 20.4 million metric tons in 2018 to around 17.8 million metric tons by 2050 as older mines close.
That gap between supply and demand is already widening. Copper ore grades have been declining for decades, meaning mines have to process more rock to extract the same amount of metal. New deposits take 15 to 20 years to develop from discovery to production. The energy transition that’s supposed to reduce fossil fuel dependence requires vastly more copper than the current system, creating a paradox: going green depends on a resource that’s becoming harder to obtain.
Gallium: A Quiet Semiconductor Squeeze
Gallium is a lesser-known metal that plays a critical role in semiconductors, LED lighting, solar panels, and advanced sensors. Unlike copper or iron, it isn’t mined directly. It’s extracted as a byproduct of aluminum and zinc processing, which means its supply depends on demand for entirely different metals.
Modeling from recent studies projects that soft gallium scarcity, where supply consistently trails demand and prices climb, sets in after 2028. Physical scarcity, where the market essentially runs dry, is expected around 2060. LED lighting alone could push gallium into hard scarcity before that date. Current extraction and recycling yields sit at just 7 to 15%, meaning the vast majority of gallium in raw materials is lost during processing. Improving those yields above 50% could push the scarcity date back to 2100, but that requires significant investment in new extraction technology.
China dominates the gallium supply chain and has already shown willingness to restrict exports, adding a geopolitical layer to the resource risk. Germanium and indium, two other metals essential for fiber optics, infrared technology, and advanced electronics, face similar supply challenges.
Commercial Fish Stocks Face Collapse
A widely cited study published in the journal Science projected that if overfishing and ocean pollution trends continued, all commercially fished seafood species could collapse by 2048. Collapse in this context means a 90% decline from historical catch levels. At the time of the study, 29% of fish and seafood species had already crossed that threshold.
The timeline is debated among marine biologists, and some fisheries have recovered thanks to better management. But the overall trajectory remains alarming. Warming oceans, acidification, and habitat destruction compound the effects of overfishing. For the roughly 3 billion people who depend on seafood as a primary protein source, this isn’t an abstract environmental issue. It’s a food security crisis that overlaps heavily with the communities least equipped to adapt.
Fossil Fuels: Not Gone, But Shifting
Fossil fuels won’t run out by 2050, but the timeline is tighter than many people assume. Based on current known reserves and present production rates, the world has roughly 49 years of natural gas, 56 years of oil, and 139 years of coal remaining. Those numbers come from the Energy Institute’s 2025 Statistical Review and represent a snapshot: they shift as new reserves are discovered and as consumption patterns change.
The more practical concern by 2050 isn’t total depletion but the rising cost and difficulty of extraction. The easiest, cheapest oil and gas deposits have largely been tapped. What remains tends to be deeper, more remote, or locked in formations that are expensive to access. Combined with climate policies pushing economies toward electrification, the fossil fuel landscape by 2050 will likely look very different, not because reserves hit zero, but because the economics and politics of extraction are changing faster than the geology.
Helium: Already in Short Supply
Helium is irreplaceable in MRI machines, semiconductor manufacturing, rocket propulsion, and scientific research. It’s the only element that remains liquid near absolute zero, making it essential for cooling superconducting magnets. Once released into the atmosphere, it’s light enough to escape Earth’s gravity entirely, making it effectively non-renewable.
Helium supply has been a concern for decades. The U.S. Federal Helium Reserve, once the world’s strategic stockpile, has been drawn down steadily. New sources in Qatar, Russia, and Tanzania have come online, but demand from the medical and tech sectors continues to grow. The helium market has already experienced multiple shortage cycles, with prices spiking and hospitals rationing MRI use. By 2050, without significant new discoveries or dramatic improvements in recycling and conservation, helium availability for non-critical uses could become extremely limited.
What Connects These Shortages
The resources approaching crisis by 2050 share a common pattern. Demand is accelerating due to population growth, technological expansion, and the energy transition, while supply faces geological limits, declining ore quality, and long development timelines. Many of these resources are also geographically concentrated, meaning a handful of countries control access. Morocco dominates phosphate, China controls gallium and rare earth processing, and helium production depends on just a few gas fields worldwide.
Recycling and efficiency improvements can extend timelines, sometimes significantly. But for most of these resources, current recycling rates are far below what’s needed. The gap between where we are and where we’d need to be to avoid shortages is, in most cases, measured in decades of sustained investment and policy change. The resources won’t all vanish at once, but the 2030s and 2040s are shaping up to be the period when multiple supply crunches begin overlapping.