Cement production creates around 7% of man-made carbon emissions. Meanwhile, in the UK crumbling concrete is forcing schools to close ...

So how big a problem is concrete, exactly?! George Imafidon gets in the mixer to discuss it with:

Prof. Kevin Paine, Director of the Centre for Climate Adaptation and Environment Research at the University of Bath, focussing on the development of smart and innovative concrete technology.

Dr Cyrille Dunant, Principal Research Associate at the University of Cambridge, working on zero emissions cement.

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