NASA satellite offers urban carbon dioxide insights

A new NASA/university study of carbon dioxide emissions for 20 major cities around the world provides the first direct, satellite-based evidence that as a city's population density increases, the carbon dioxide it emits per ...

Ghostly traces of massive ancient river revealed

Using zircon crystals, researchers have discovered the route of a massive ancient river that could help find new reservoirs of fossil fuels and suggest how modern rivers might change over time.

China's zero-waste activists fight overconsumption

Parcels piled high at sorting centres and drivers speeding down bike lanes to deliver takeout lunches are ubiquitous sights in urban China, where e-commerce and delivery apps have taken over everyday life.

Heating woes fuel Balkan smog crisis

As winter grips the Balkans, the poor are caught in a cruel bind, being forced to light fires at home for heating while fuelling a pollution crisis smothering the region.

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