The world has entered "an era of global water bankruptcy" with irreversible consequences, according to a new United Nations report.
Regions across the world are afflicted by severe water problems: Kabul may be on course to be the first modern city to run out of water. Mexico City is sinking at a rate of around 20 inches a year as the vast aquifer beneath its streets is over-pumped. In the US Southwest, states are locked in a continual battle over how to share the shrinking water of the drought-stricken Colorado River.
"If you keep calling this situation a crisis, you're implying that it's temporary. It's a shock. We can mitigate it," said Kaveh Madani, director of the UN University's Institute for Water, Environment and Health, and the report's author.
With bankruptcy, while it's still vital to fix and mitigate where possible, "you also need to adapt to a new reality… to new conditions that are more restrictive than before," he told CNN.
The statistics in the report are stark: more than 50% of the planet's large lakes have lost water since 1990, 70% of major aquifers are in long-term decline, an area of wetlands almost the size of the European Union has been erased over the past 50 years, and glaciers have shrunk 30% since 1970. Even in places where water systems are less strained, pollution is reducing the amount available for drinking.
"Many regions are living beyond their hydrological means" and it's impossible now to return to conditions that used to exist, Madani said.
It brings human consequences: nearly 4 billion people face water scarcity for at least one month every year.
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📷: Yasin Akgul/AFP/Getty Images; Elke Scholiers/Getty Images; Kevin Carter/Getty Images; Morteza Aminoroayayi/Middle East Images/AFP/Getty Images
England’s summer water stress is resetting sustainable building design. Projects are moving from passive consumption to active water stewardship through leakage reduction, smart metering, rainwater and greywater reuse, drought‑resilient landscapes and green infrastructure. Specifications are shifting to sustainable material specification and eco-design for buildings that tolerate heat and shrink–swell cycles, tying water resilience to building lifecycle performance, lifecycle assessment and whole life carbon assessment. Clients are demanding measurable carbon footprint reduction and life cycle cost certainty across design, build and operation.
Climate risk extends to cold regions as permafrost degradation destabilises foundations, roads and pipelines. Geotechnical strategies now require continuous monitoring, adaptable detailing and low carbon design aligned with environmental sustainability in construction. Frameworks such as BREEAM, including breeam v7, are expected to hard‑wire resilience, whole life carbon and sustainable building practices into procurement. Designers are prioritising low embodied carbon materials evidenced by environmental product declarations (epds), together with green building materials and renewable building materials, to reduce embodied carbon in materials and the carbon footprint of construction while supporting circular economy goals.
Market responses are consolidating around retrofit‑first and industrialised delivery. Adaptive reuse of offices in London, exemplified by deep retrofits such as 75 London Wall, preserves structure, slashes embodied carbon, advances circular economy in construction and enables end-of-life reuse in construction through circular construction strategies. Modular and offsite expansion across the Benelux is improving resource efficiency in construction, cutting waste and accelerating programmes with low carbon construction materials and green building products, supporting eco‑friendly construction and green construction. Energy volatility is accelerating net zero carbon buildings and energy-efficient buildings through electrification, on‑site generation and storage, and long‑term power purchase agreements. Briefs now target net zero whole life carbon and carbon neutral construction, integrating sustainable design, low carbon building strategies and decarbonising the built environment with robust life cycle thinking in construction.
The direction of travel is clear: rigorous whole life carbon, embodied carbon and lifecycle assessment embedded in sustainable construction, backed by metered water budgets and verifiable performance data, will define sustainable urban development, drive the circular economy and deliver net zero carbon goals across building and construction.
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