“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
The global shift towards sustainable construction is advancing from research to measurable implementation through innovations that reshape the built environment. Johnson Matthey’s collaboration in China on biomethanol technology represents a breakthrough for the circular economy in construction, aligning industrial chemistry with the drive to decarbonise the sector and reduce the carbon footprint of construction.
Projects such as the refurbishment of Bell’s Yard in London demonstrate how sustainable building design merges adaptive reuse and low embodied carbon materials to extend building lifecycle performance. The project exemplifies whole life carbon assessment and lifecycle assessment principles, showing that environmental sustainability in construction now informs both design and policy.
Compact housing developments like Ash Mews in Stratford reveal how low carbon design and sustainable building practices can turn limited space into energy-efficient buildings shaped by principles of net zero carbon buildings and circular construction strategies. Each project tests life cycle thinking in construction, highlighting how a detailed understanding of embodied carbon in materials and resource efficiency in construction directly reduces life cycle cost.
Artificial intelligence is increasingly integrated into sustainable design workflows, streamlining lifecycle modelling and improving the accuracy of whole life carbon calculations. Combined with new transparency requirements and environmental product declarations (EPDs), these digital tools promote accountability in sustainable material specification and environmental impact of construction.
The sector’s evolution embodies a commitment to net zero whole life carbon performance. As BREEAM and the forthcoming BREEAM v7 framework drive measurable benchmarks for eco-design for buildings, sustainable architecture is moving toward low carbon building certification rooted in verifiable environmental metrics. The integration of green building products, renewable building materials and end-of-life reuse in construction strengthens circular economy principles, turning sustainable construction into a credible engine of sustainable urban development.
Green construction has progressed from aspirational rhetoric to evidence-based transformation. Through carbon neutral construction strategies focused on low-impact construction, decarbonising the built environment is no longer theoretical; it defines the new baseline for a resilient, responsible and regenerative construction industry.
Whole Life Carbon is a platform for the entire construction industry—both in the UK and internationally. We track the latest publications, debates, and events related to whole life guidance and sustainability. If you have any enquiries or opinions to share, please do
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