It started with a melting glacier that set off a huge landslide, which triggered a 650-foot high mega-tsunami in Greenland last September. Then came something inexplicable: a mysterious vibration that shook the planet for nine days. Over the past year, dozens of scientists across the world have been trying to figure out what this signal was. Now, they have an answer.
It's called a "cascading hazard," said Kristian Svennevig, a geologist at the Geological Survey of Denmark and Greenland. And it all started with human-caused climate change.
For years, the glacier at the base of a huge mountain towering nearly 4,000 feet above Dickson Fjord had been melting, as many glaciers are in the rapidly warming Arctic.
As the glacier thinned, the mountain became increasingly unstable before it eventually collapsed on September 16 last year, sending enough rock and debris tumbling into the water to fill 10,000 Olympic-sized swimming pools. The subsequent mega-tsunami — one of the highest in recent history — set off a wave which became trapped in the bendy, narrow fjord for more than a week, sloshing back and forth every 90 seconds.
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📸 : Danish Army
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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