The Problems With Concrete

Barnabas: I've always really loved the National Theatre and the Barbican that look kind of monolithic but there's a beauty in there. Barnabas: Concrete is one of the major emitters of global warming gases of CO2 and other things China is pouring more concrete unbelievable amounts of concrete well not just China but all over the world it takes a lot of energy to make it. The chemical process that produces it lets off for tenths of all the limestone that goes in there, says Barnabas. "I think they're absolutely fabulous" said Barnabas about nuclear power stations.