Ali Hajimiri has spent a decade researching how to put solar panels in space and beam the energy down to Earth. This year, the Caltech electrical engineering professor and his team took a step toward making space-based solar a reality.
They launched Maple, a 30-centimeter-long space solar prototype equipped with flexible, lightweight transmitters. The aim was to harvest energy from the sun and transfer it wirelessly in space, which they did, managing to light up a pair of LEDs. The amount of energy they detected was too small to be useful, but they had succeeded in wirelessly beaming down power from space.
At its heart, space-based solar is a fairly straightforward concept. Humans could harness the enormous power of the sun in space, where it's available constantly — unaffected by bad weather, cloud cover, nighttime or the seasons — and beam it to Earth. Read more about it at the link in our bio.
📸: Space Solar
Waste management and resource recovery remain essential to circular progress. The Department for Energy Security and Net Zero’s recent review identified strong potential for circular construction strategies and end‑of‑life reuse in construction to deliver quantifiable carbon savings. Yet challenges persist in the rollout of Simpler Recycling due to legacy property structures. Strengthening these back‑end systems ensures green building products re‑enter value chains, supporting both circular economy objectives and sustainable urban development. The collective impact across policy, design, education, and technology confirms that the carbon footprint of construction can be reduced dramatically when the sector treats sustainability as an integrated, measurable discipline rather than an optional ambition.
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