The largest dam removal project in US history is finally complete, after crews last week demolished the last of the four dams on the Klamath River.
It’s a significant win for tribal nations on the Oregon-California border who for decades have fought to restore the river back to its natural state.
The removal of the four hydroelectric dams — Iron Gate Dam, Copco Dams 1 and 2, and JC Boyle Dam — allows the region’s iconic salmon population to swim freely along the Klamath River and its tributaries, which the species have not been able to do for over a century since the dams were built.
The Yurok Tribe in Northern California are known as the "salmon people." To them, the salmon are sacred species that are central to their culture, diet and ceremonies. As the story goes, the spirit that created the salmon also created humans and without the fish, they would cease to exist.
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📸: Carlos Avila Gonzalez/Hearst Newspapers/San Francisco Chronicle/Getty Images
Sustainable construction is shifting from rhetoric to rigorous evaluation of place, purpose, and impact. Developers in water‑stressed regions are prioritising compact, low carbon building forms grounded in environmental sustainability in construction, aligning land‑use with watershed management and climate resilience. In India, repeated landslide damage has underscored the cost of neglecting hydrology and slope stability, reinforcing the role of sustainable building design rooted in life cycle thinking in construction and local conditions.
Across the sector, high‑performance affordable housing and corporate campuses are setting new benchmarks for sustainable building practices. Whole life carbon assessment and lifecycle assessment are emerging as essential tools for comparing retrofit versus new‑build decisions, directing focus to embodied carbon, embodied carbon in materials and end‑of‑life reuse in construction.
The scrutiny of the carbon footprint of construction and life cycle cost metrics is steering clients toward low embodied carbon materials, energy‑efficient buildings and renewable building materials. Corporate commitments to net zero carbon and net zero whole life carbon are driving adoption of eco‑design for buildings and low carbon design frameworks informed by BREEAM and BREEAM v7 standards.
Circular economy in construction principles are shaping specifications that favour circular construction strategies, green building materials and sustainable material specification to minimise waste and maximise resource efficiency in construction. Equity and resilience now define sustainable urban development. Communities engaged in green infrastructure planning and carbon neutral construction are finding that social outcomes and trust can accelerate delivery and reduce the environmental impact of construction.
Practitioners are integrating whole life carbon data, environmental product declarations (EPDs) and building lifecycle performance indicators alongside cost and quality, embedding sustainable design and green construction values at every scale. The global agenda for decarbonising the built environment is moving from aspiration to measurable specification, signalling a decisive turn toward low‑impact construction that balances performance, affordability and long‑term sustainability.
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