Decades-old and long-debunked myths about so-called chemtrails have become a...

CNN Climate 1 year ago

Decades-old and long-debunked myths about so-called chemtrails have become a central part of a wild conspiracy theory that falsely asserts the US government used non-existent weather manipulation technology to create the devastation caused by Hurricanes Helene and Milton. As myths about Milton and Helene spread, interest in chemtrails increased too on Google search and social media. Chemtrail conspiracy theorists falsely believe condensation trails (known as contrails) left behind by aircraft in the sky are full of toxic chemicals spread by the government to control the weather or control people's minds. In reality, scientists say contrails appear when water vapor condenses and freezes around the exhaust from an aircraft. The virality the conspiracy theory has achieved online in the last couple of weeks has never been seen before and is a cause for concern, climate and weather experts tell CNN. Read more at the link in @cnnclimate's bio. 📷: Taro Hama @ e-kamakura/Moment RF/Getty Images

layersDaily Sustainability Digest

Published about 20 hours ago



Compressed earth block projects in Kenya’s drylands are signalling a shift towards sustainable construction that balances material performance with environmental sustainability in construction. By replacing kiln‑fired bricks and cement with locally produced low embodied carbon materials, these buildings achieve reduced embodied carbon while enhancing thermal comfort through passive design. The combination of thermal mass and vapour‑open walls supports sustainable building design adapted to warmer climates and delivers measurable gains in lifecycle assessment and life cycle cost efficiency.

As whole life carbon and embodied carbon in materials become central to regulation and procurement, codification and quality assurance will dictate how rapidly such natural materials scale to mainstream use. Compressed earth blocks in Kenya exemplify how local innovation aligns with sustainability targets and social benefits for communities adapting to climate stress.

European policy is steering the supply chain towards a circular economy in construction. Tighter controls on plastic imports are designed to foster a stable market for compliant recycled polymers and strengthen traceability. For manufacturers pursuing higher recycled content, this supports circular construction strategies and improves environmental product declarations (EPDs). For specifiers and project teams, it provides a stronger evidence base for whole life carbon assessment within sustainable building practices and reinforces the commitment to resource efficiency in construction.

The UK’s accelerating offshore wind capacity, now exceeding 16GW, deepens the transition towards net zero carbon buildings and reduces the carbon footprint of construction by decarbonising energy supply. As sites electrify and equipment integrates renewable sources, the alignment between energy‑efficient buildings and carbon neutral construction grows closer. This shift enables data‑driven evaluation of whole life carbon performance and encourages contracting models that value carbon intensity alongside cost, advancing low carbon design and net zero objectives across the sector.

In alpine zones and high‑risk regions, the integration of climate‑informed planning, geotechnical monitoring and enforceable safety zones underscores the need to view climate adaptation as a core aspect of sustainable architecture. Infrastructure such as Spain’s high‑speed rail demonstrates how green construction combined with whole life carbon accounting can deliver deep emissions cuts while improving resilience. The global construction industry must merge such systemic decarbonisation with eco‑design for buildings, green building materials and sustainable material specification, ensuring that every project contributes to long‑term building lifecycle performance and to decarbonising the built environment.

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