“Butterflies have been declining the last 20 years,” said study co-author...

CNN Climate 1 year ago

“Butterflies have been declining the last 20 years,” said study co-author Nick Haddad, an entomologist at Michigan State University. “And we don’t see any sign that that’s going to end.” The first countrywide systematic analysis of butterfly abundance found that the number of butterflies in the Lower 48 states has been falling on average 1.3% a year since the turn of the century, with 114 species showing significant declines and only nine increasing, according to a study in the journal Science. A team of scientists combined 76,957 surveys from 35 monitoring programs and blended them for an apples-to-apples comparison and ended up counting 12.6 million butterflies over the decades. Last month an annual survey that looked just at monarch butterflies, which federal officials plan to put on the threatened species list, counted a nearly all-time low of fewer than 10,000, down from 1.2 million in 1997. Read more about the study at the link in our bio. Tess Crowley/Chicago Tribune/Tribune News Service via Getty Images; RJ Sangosti/MediaNews Group/The Denver Post via Getty Images; Robyn Beck/AFP/Getty Images

layersDaily Sustainability Digest

Published about 3 days ago



Financial institutions are accelerating sustainable construction by aligning lending with measurable environmental performance. Santander UK’s decision to adapt mortgage models for Octopus Energy’s Zero Bills homes integrates credit policy with energy-efficient buildings, translating net zero carbon ambitions into mainstream financial metrics. This shift signals the emergence of whole life carbon assessment as a determinant in property valuation and positions embodied carbon and life cycle cost analysis as standard tools of risk management across the sector.

Digital transformation is amplifying the movement. The Monklands digital hospital project in Scotland demonstrates how offsite manufacturing, lifecycle assessment and connected data platforms enhance building lifecycle performance, minimise waste, and verify embodied carbon in materials. Durham’s adoption of digital planning and assessment tools reflects a broader drive toward resource efficiency in construction and environmental sustainability in construction. Together these initiatives redefine sustainable building design by embedding whole life carbon accountability into design and delivery workflows.

Policy remains an enabling force but the centre of momentum is shifting from government mandates to operational proof. A renewed national emphasis on green affordability and the integration of social equity with decarbonising the built environment are reinforcing the transition toward net zero whole life carbon outcomes. These developments illustrate a maturing circular economy in construction where sustainable building practices, low carbon design and eco-design for buildings converge to deliver verifiable carbon footprint reduction. The industry’s direction is now measurable—kilograms of CO₂, minutes saved, resources reused—evidence that green construction is evolving from aspiration to tangible low carbon building performance.

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