Scorching temperatures and a long, dry summer have given locals and tourists...

CNN Climate 21 days ago

Scorching temperatures and a long, dry summer have given locals and tourists alike a rare opportunity to see the remains of a 2,000-year-old bridge that once spanned the Tiber river that weaves through the center of Rome. The flow of the Tiber, which is fed from tributaries from the northern Apennine Mountains, has fallen below 80 cubic meters a second, half the national average for this time of year, according to Rome's civil protection coordinator, Giovanni Giganti. "We are facing a major water crisis. And it is a crisis that is also due to the fact that this winter we did have quite abundant rainfall, but then the dry periods … were quite long," Giganti told the Associated Press. Nero's Bridge (Pons Neronianus) was thought to have been built as a triumphal monument by the Emperor Caligula around 39 AD. But it is referred to as Nero's Bridge because Nero, Caligula's nephew, renamed a number of ancient structures after himself during his rule from 54 to 68 AD, according to historical accounts. The bridge originally connected the ancient Campus Martius area, which now houses the Spanish Steps, the Piazza del Popolo and the posh shopping streets around Via Condotti, to the Circus of Nero stadium where St. Peter was martyred and upon which St. Peter's Basilica and the Vatican City now stand. Tap our link in bio for more. 📸: Andreas Solaro/AFP/Getty Images

layersDaily Sustainability Digest

Published about 10 hours ago



BloombergNEF’s new estimate that the UK, EU and Norway must mobilise about $1.3 trillion a year raises the stakes for the built environment. Mass retrofit, electrified heat and grid upgrades now need to deliver net zero whole life carbon and net zero carbon buildings, guided by whole life carbon assessment, lifecycle assessment and clear targets for whole life carbon, embodied carbon and the carbon footprint of construction. Investment choices should be rooted in life cycle cost, building lifecycle performance and resource efficiency in construction, aligning sustainable building design, sustainable design and eco-design for buildings with practical delivery at scale.

The UK move to end support for small‑scale biomass after Renewables Obligation contracts shifts the centre of gravity for heat to energy‑efficient buildings, heat pumps and cleaner networks. Low carbon design and low carbon building retrofit will depend on sustainable material specification, low carbon construction materials and low embodied carbon materials, evidenced through environmental product declarations (epds). Clients are turning to breeam and breeam v7 to benchmark environmental sustainability in construction and to procure green building materials and green building products that meet net zero carbon goals.

A deep underground nuclear reactor proposal in the US clearing a federal safety hurdle signals potential for compact, reliable clean power to de‑risk electrification for energy‑intensive construction sites and materials producers when variable renewable generation is constrained. Such baseload can support decarbonising the built environment, carbon neutral construction and circular economy in construction by enabling recycling, end-of-life reuse in construction and low-impact construction at scale, while addressing embodied carbon in materials.

Slow, uneven rebuilding in the Himalayas after last year’s glacial disaster underlines that resilience is underfunded. Firms working in high‑risk terrain need risk‑informed design, community engagement and adaptable finance embedded in sustainable architecture, green construction and green infrastructure. Life cycle thinking in construction, carbon footprint reduction and rigorous management of the environmental impact of construction must be planned from the outset to support the circular economy and eco‑friendly construction.

With housing output shrinking again, counter‑cyclical public investment is needed to keep the green upgrade pipeline moving. Procurement that rewards circular construction strategies, sustainable construction and sustainable urban development—bundling retrofit with new, renewable heat‑ready projects—can stabilise supply chains and skills while accelerating carbon footprint reduction and sustainability across building and construction.

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