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
Sustainable construction is moving from ambition to delivery, with finance, planning and grid capacity now defining the pace of decarbonising the built environment. Climate risk is becoming a capital allocation issue, yet the gap between stated concern and investment remains severe, especially for SMEs facing a global green-finance shortfall for energy efficiency, clean technology and adaptation. For construction firms working on thin margins, net zero carbon buildings will depend on bankable resilience, credible life cycle cost analysis and procurement models that reward whole life carbon performance rather than short-term lowest cost.
The UK’s planned major electricity substation in Tees Valley underlines the scale of green infrastructure required to support industrial decarbonisation, heat electrification, energy-efficient buildings and low carbon construction materials. Grid reinforcement is critical to net zero carbon delivery because sustainable building design relies on clean power as much as sustainable material specification. Without resilient energy networks, low carbon design, renewable building materials and green building products cannot deliver meaningful carbon footprint reduction across the built environment.
Planning reform could accelerate retrofit, renewable infrastructure and sustainable urban development, provided faster approvals do not weaken scrutiny of embodied carbon, nature, resilience and the environmental impact of construction. Whole life carbon assessment, lifecycle assessment and life cycle thinking in construction should sit at the centre of decision-making, with BREEAM, BREEAM v7 and environmental product declarations (EPDs) helping clients compare embodied carbon in materials and building lifecycle performance. Speed must support high-quality sustainable design, not simply move weak schemes through the system faster.
The worsening climate outlook, including warnings on ice loss and a possible 2.6C warming trajectory, reinforces the need for eco-design for buildings that are resilient to future extremes rather than historic weather patterns. Environmental sustainability in construction now requires circular economy principles, circular economy in construction, end-of-life reuse in construction and resource efficiency in construction to reduce the carbon footprint of construction. The sector’s pragmatic next phase is clear: net zero whole life carbon, circular construction strategies, low embodied carbon materials and sustainable building practices must become standard practice in green construction, eco-friendly construction and carbon neutral construction.
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