A colossal sea arch that had long been a major landmark on Hawaii's rugged...

CNN Climate 48 minutes ago

A colossal sea arch that had long been a major landmark on Hawaii's rugged coastline has collapsed into the Pacific Ocean more than 500 years after it was naturally formed, the local park service confirmed. Hōlei Sea Arch stood at a height of roughly 90 feet in Hawaii's Volcanoes National Park on the southern coast of the Big Island — the largest and youngest island of the Hawaiian chain. The arch formed around 550 years ago when ancient lava flow from the eruption of one of the island's six volcanoes hit the cliff edges and carved the vault, creating a natural marvel that drew visitors to the spot for many years, according to the United States National Park Service (NPS). While the exact time of the collapse is unknown, the Volcanoes National Park team said on social media Thursday that the arch was still standing on Wednesday, September 23, when the park was temporarily closed during Tropical Storm Nolo. When it reopened on Monday, September 28, the arch was gone. "Yes, it's true. RIP Hōlei Sea Arch," Volcanoes National Park said in social media posts, alongside before-and-after photographs revealing a stark shift in the scenery. "Hōlei Sea Arch was a very special place to so many of our visitors," it added. More at the link in @cnn's bio. 📸: Yun Han Xu/Moment RF/Getty Images | Janice Wei/NPS

layersDaily Sustainability Digest

Published about 11 hours ago



Sustainable construction is shifting from isolated green building products to tougher questions of delivery, finance and measurement. Climate Week debate on clean industrial policy reinforced the need to link decarbonising the built environment with jobs, energy security and household costs. Low carbon construction materials such as steel and cement will not scale without stable demand, affordable renewable power and procurement rules based on whole life carbon, embodied carbon and whole life carbon assessment.

Britain’s electricity system is emerging as a critical constraint for net zero carbon buildings. Proposals for a “Great British Grid” point to deeper demand shifting, storage, heat pump integration and smarter controls across sustainable building design and facilities management. Rising concern over offshore wind leasing costs highlights the risk that expensive clean power infrastructure could weaken the business case for electrification, low carbon building strategies and net zero whole life carbon targets.

Resilience is becoming central to environmental sustainability in construction. Escalating UK wildfire risk strengthens the case for climate adaptation in planning, sustainable material specification, maintenance and eco-design for buildings, especially at the rural-urban edge. Sustainable design now has to address both carbon footprint reduction and climate durability, proving that energy-efficient buildings must also withstand the conditions they are intended to help stabilise.

The most important progress may come from data and measurement. Cambridge’s new framework for construction productivity, wider use of asset intelligence and stronger lifecycle assessment can improve building lifecycle performance, reduce waste and support resource efficiency in construction. Better sequencing, smarter maintenance and clearer environmental product declarations (EPDs) can lower the carbon footprint of construction, improve life cycle cost outcomes and support circular economy in construction, including end-of-life reuse in construction and circular construction strategies. Standards and benchmarks such as BREEAM and BREEAM v7 will matter most where they drive measurable low carbon design, low embodied carbon materials and practical sustainable building practices rather than superficial green construction claims.

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