Long-exposure photography shows the paths of satellites criss-crossing the night sky.

With hundreds of satellites launched each year and tens of thousands more planned, scientists are increasingly concerned about an emerging problem: emissions from the fuels burned in launches and from the pollutants released when satellites and rocket stages flame out on reentry.

By Jon Gertner

Solutions

From Ruins to Reuse: How Ukrainians Are Repurposing War Waste

Russian bombardments have generated more than a billion tons of debris across Ukraine since 2022. Now, local and international efforts are meticulously sorting the bricks, concrete, metal, and wood, preparing these materials for a second life in new buildings and roads. 

By Paul Hockenos

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Part of the South Fork Wind Farm near Long Island, New York.

Energy

Facing a Hostile Administration, U.S. Offshore Wind Is in Retreat

Offshore wind had been poised to take off along the East Coast, with about 30 utility-scale farms planned. But the Trump administration’s opposition to wind power has caused most of those projects to be abandoned, with only seven farms now moving ahead or in operation.

By Andrew S. Lewis

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