The global water cycle has become "increasingly erratic and extreme" with wild swings between droughts and floods, spelling big trouble for economies and societies, according to a report published Thursday by the World Meteorological Organization.
The water cycle refers to the complex system by which water moves around the Earth. It evaporates from the ground — including from lakes and rivers — and rises into the atmosphere, forming large streams of water vapor able to travel long distances, before eventually falling back down to Earth as rain or snow.
Climate change, driven by humans burning fossil fuels, is upending this process.
Many regions grappled with a dearth of water in 2024, the planet's hottest year on record. Amazon rivers fell to unprecedented lows, parts of southern Africa endured a drought so extreme governments said they needed to cull hundreds of animals including elephants, and crops shriveled in areas of the United States such as Texas, Oklahoma and Kansas.
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📷: Jonathan Drake/Reuters/File; Luid Acosta/AFP/Getty Images/File
Waste management and resource recovery remain essential to circular progress. The Department for Energy Security and Net Zero’s recent review identified strong potential for circular construction strategies and end‑of‑life reuse in construction to deliver quantifiable carbon savings. Yet challenges persist in the rollout of Simpler Recycling due to legacy property structures. Strengthening these back‑end systems ensures green building products re‑enter value chains, supporting both circular economy objectives and sustainable urban development. The collective impact across policy, design, education, and technology confirms that the carbon footprint of construction can be reduced dramatically when the sector treats sustainability as an integrated, measurable discipline rather than an optional ambition.
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