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

CNN Climate 2 years 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 9 hours ago



BloombergNEF estimates the EU, UK and Norway must mobilise about $1.3 trillion annually to remain on a credible 2050 pathway, making the built environment a frontline priority. Deep retrofit, electrified heat, sturdier grids and climate adaptation now determine balance sheet resilience as much as operational performance. UK support for small-scale biomass has lapsed without replacement, signalling a shift toward technologies that prove sustainability and system value. Hydropower retains a role where environmental safeguards hold; biomass must meet robust criteria. Recent Himalayan floods underscore that resilience is part of the brief, not a discretionary line item. Designing for cascading hazards, redundancy and social equity is cheaper than rebuilding.

Investment and procurement need to prize whole life carbon, life cycle cost and lifecycle assessment. Clients and supply chains should embed whole life carbon assessment, cut embodied carbon through low embodied carbon materials and embodied carbon in materials verified by environmental product declarations (EPDs), and scale circular economy in construction via circular construction strategies, resource efficiency in construction and end-of-life reuse in construction. Targets for net zero whole life carbon and net zero carbon buildings require sustainable building design, eco-design for buildings, sustainable design and low carbon design aligned with BREEAM and BREEAM v7. Priorities include energy-efficient buildings, low carbon construction materials, renewable building materials, green building materials and green building products within sustainable material specification. Programmes that integrate green infrastructure, nature-based risk management and building lifecycle performance will accelerate decarbonising the built environment, deliver carbon neutral construction, reduce the carbon footprint of construction and mitigate the environmental impact of construction while advancing sustainable construction, eco-friendly construction, sustainable building practices and sustainable urban development.

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