Local weather change: Slag heaps from steelmaking may take in CO2

Around 180 million tonnes of slag is buried in heaps across the UK, and researchers are investigating whether or not it may very well be used to take away carbon dioxide


8 June 2022

slag heap

A slag heap made up of iron trade waste in Barrow-in-Furness, Cumbria, UK

Ashley Cooper pics/Alamy

Scientists are exploring whether or not a legacy of the UK’s polluting industrial previous, the handfuls of slag heaps that dot the nation, may chart the way in which to a cleaner future by slowing local weather change.

Since the commercial revolution, about half of the nation’s slag – a stony by-product of constructing iron and metal – has been used as a building materials. But the opposite half is an unseen and unused potential useful resource, with round 180 millon tonnes in …

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