The battle to curb our appetite for concrete - BBC News
We extract billions of tonnes of sand and gravel each year to make concrete for the building industry, and this is having an increasing environmental impact as beaches and river beds are stripped, warn campaigners....
'Huge impact' - Concrete will naturally reabsorb some atmospheric CO2, but only very slowly. Researchers at France's technology institute, Ifsttar, are looking at ways to speed this up, to get recycled concrete to absorb far higher levels of CO2.
"We want to improve the ecological footprint of concrete, and to improve the recycled properties of concrete after demolition," says Dr Assia Djerbi.
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