It started with the mysterious discovery of more than a hundred turtles, some with their shells smashed, others dismembered, all of them dead. It ended with a potential warning for the future.
It was Gregory Bulté who found the turtles. The biologist from Carleton University was out on the water of eastern Ontario's Opinicon Lake in April 2022 when he saw a dead northern map turtle — so-called because its shell resembles the contour lines of a map. As he bent to pick it up from the shallows, he saw another.
Bulté raced home, fetched his wetsuit and snorkel and got into the frigid water — where winter ice had recently melted — to collect the bodies. He kept finding more piles of dead turtles; he filled buckets with them. "I was like, 'Whoa, when is this going to end?'" he said.
When it eventually did, he had nearly 150 dead turtles, many of which Bulté knew from his two decades of monitoring work at the near-pristine, forest fringed lake. It was a devastating blow, wiping out roughly 10% of the lake's population.
The deaths were a puzzle for Bulté. It was clear from the turtles' damaged bodies that this was a predator attack, and only one animal was likely strong enough to have done it: the river otter.
Read more at the link in our bio.
📸: Michael O. Snyder and Justin Dalaba
The strongest signals for sustainable construction are coming from the systems that determine whether low-carbon development is bankable, operable and resilient. The UK Climate Change Committee’s warning on delivery failures exposes a widening gap between policy ambition and execution, especially where buildings depend on clean power, retrofit capacity, credible regulation and measurable whole life carbon outcomes. For developers, investors and occupiers, environmental sustainability in construction now depends on evidence: whole life carbon assessment, lifecycle assessment, life cycle cost modelling and verified building lifecycle performance.
The next clean-power Contracts for Difference auction is directly relevant to sustainable building design. Analysts’ estimates of potential £11bn savings in wholesale power costs to 2050 would strengthen the commercial case for electrified heat, on-site renewables, energy-efficient buildings and net zero carbon buildings. Cheaper clean electricity would support low carbon design and carbon footprint reduction across new-build and retrofit portfolios. Without it, net zero carbon strategies remain exposed to volatile energy prices and cautious capital allocation.
Operational performance is becoming a defining test for green construction. Calls for pumps and building services to become part of a building’s “digital DNA” reflect a shift from designing efficient assets to proving performance in use. Data-rich systems, predictive maintenance and transparent performance records are now central to sustainable building practices, carbon management and asset value. A low carbon building must be efficient beyond practical completion, with life cycle thinking in construction embedded in procurement, commissioning and facilities management.
Climate adaptation is moving into core specification. London’s parks authorities are rethinking planting and watering as hotter, drier summers put urban green space under pressure. For sustainable urban development, landscape is no longer decorative mitigation; it is green infrastructure that cools cities, manages water and protects public health. This is where eco-design for buildings, sustainable architecture and low-impact construction must connect with resilience, biodiversity and public realm performance.
The post-Grenfell debate reinforces a fundamental point: sustainable design cannot be separated from competence, traceability and trust. A project cannot claim net zero whole life carbon if it is unsafe, poorly documented or unmanageable. The next phase of decarbonising the built environment will be judged through embodied carbon, embodied carbon in materials, sustainable material specification, environmental product declarations (EPDs), low embodied carbon materials and credible circular economy planning. Low carbon construction materials, renewable building materials, green building materials and green building products will matter only where they support resource efficiency in construction, end-of-life reuse in construction and practical circular construction strategies.
The direction of travel is clear. The carbon footprint of construction must be reduced through robust whole life carbon assessment, reliable clean power, better operational data, circular economy in construction and resilient green infrastructure. The sector’s credibility will rest on delivering net zero carbon buildings that perform under real climatic, regulatory and economic pressure.
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