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

CNN Climate 7 months 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 12 hours ago



Supply chains and valuation trends are reshaping sustainable construction. Mineral sourcing has become a critical determinant of embodied carbon, directly influencing the whole life carbon profile of buildings. As more than 100 countries engage in redefining mining and processing frameworks, the carbon footprint of construction materials such as steel, aluminium and copper will dictate future procurement strategies. Teams evaluating cost plans must now conduct whole life carbon assessments integrating life cycle cost and lifecycle assessment data to quantify environmental sustainability in construction.

This signals a shift toward circular economy practices, where low embodied carbon materials and transparent environmental product declarations (EPDs) govern material selection. The financing of renewable energy infrastructure across the UK and Europe demonstrates how cheap, clean power underpins sustainable building design and low carbon design. A £400m injection into solar and wind assets enhances the viability of net zero carbon buildings and electrified manufacturing sites, advancing low carbon construction materials and supporting BREEAM and BREEAM v7 certification pathways.

These developments strengthen the link between operational performance, resource efficiency in construction, and lower life cycle costs for energy-efficient buildings. Investors are embedding whole life carbon metrics into valuation models as part of decarbonising the built environment. Green construction premiums and brown discounts now reflect lifecycle risk, as market signals confirm that sustainable building practices and eco-design for buildings are shaping long-term asset performance.

The professional imperative is clear: achieve net zero whole life carbon through circular construction strategies, carbon neutral construction methods and end-of-life reuse in construction, ensuring the built environment aligns with global sustainability and green infrastructure goals.

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