The turquoise waters of Hōnaunau Bay in Hawaii, an area popular with...

CNN Climate 1 year ago

The turquoise waters of Hōnaunau Bay in Hawaii, an area popular with snorkelers and divers, are teeming with spiny creatures that threaten to push the coral reef "past the point of recovery," new research has found. Sea urchin numbers here are exploding as the fish species that typically keep their populations in check decline due to overfishing, according to the study, published last month in the journal PLOS ONE. It's yet another blow to a reef already suffering damage from pollution as well as climate change-driven ocean heat waves and sea level rise. Kelly J. van Woesik, a researcher at the North Carolina State University Center for Geospatial Analytics and a study author, first noticed unusually high numbers of sea urchins on snorkeling trips. "I knew there was a story to be told," she said. She and her fellow researchers used data from scuba surveys and images taken from the air to track the health of the reef. "We found on average 51 urchins per square meter, which is among the highest recorded densities on coral reefs anywhere in the world," van Woesik said. Sea urchins are small marine invertebrates, characterized by their spiny bodies and found in oceans around the world. They play a useful role in preventing algae overgrowth, which can choke off oxygen to coral. However, they also eat the reef and too many of them can cause damaging erosion. More at link in bio. 📸: Kelly van Woesik | Greg Asner

layersDaily Sustainability Digest

Published about 2 hours ago



Europe’s transition accountants set the bar: BloombergNEF estimates the EU, UK and Norway must mobilise about $1.3 trillion per year to stay on track for net zero by mid‑century. Capital is pivoting to projects that prove demand reduction, resilience and audited performance, raising the premium on whole life carbon, whole life carbon assessment, lifecycle assessment and life cycle cost embedded in delivery, supported by environmental product declarations (EPDs) and verifiable data.

Portfolios aligned to net zero whole life carbon and decarbonising the built environment will clear investment committees faster, especially where sustainable building design reflects life cycle thinking in construction and aligns with breeam and anticipated breeam v7 requirements. Expect stronger scrutiny of embodied carbon and the carbon footprint of construction, with tighter performance guarantees and less tolerance for optimistic modelling.

Physical risk is now a design determinant. Severe floods in Nepal removed more than a tenth of national hydropower capacity in a week, underlining the limits of single‑technology strategies and historic baselines. Credible, sustainable design calls for diversified energy systems, including renewable generation, debris‑ and sediment‑tolerant assets, green infrastructure and watershed‑scale nature‑based measures, paired with specifications that reduce embodied carbon in materials while improving building lifecycle performance, carbon footprint reduction, the environmental impact of construction and low‑impact construction. Lenders and insurers are steering towards teams demonstrating sustainable building practices and sustainable architecture with bankable pathways to carbon neutral construction.

Digital waste tracking in the UK will impose radical transparency across construction supply chains. With end‑to‑end data, waste becomes both a liability and a tradable asset, accelerating the circular economy and circular economy in construction through design for disassembly, end‑of‑life reuse in construction, circular construction strategies and product passports. Expect rapid uptake of eco‑design for buildings, resource efficiency in construction and sustainable material specification, with greater use of low embodied carbon materials, renewable building materials, green building materials and green building products to reduce embodied carbon across retrofit and new build. The regulatory shift will reward firms that can evidence environmental sustainability in construction with robust datasets that unlock prequalification.

Early regulatory clearance for an underground micro‑reactor in the United States signals the coming of site‑adjacent, 24/7 low‑carbon heat and power for energy‑intensive materials plants and district energy. If proven at scale, such clean energy can enable low carbon construction materials, low carbon design for energy‑efficient buildings and low carbon building operations, supporting net zero carbon buildings across sustainable urban development and speeding net zero carbon delivery.

The direction of travel is unmistakable: sustainable construction grounded in whole life carbon, embodied carbon accountability and the circular economy is now the baseline for green construction, eco‑friendly construction and sustainability across every building and infrastructure programme.

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