Nature and EnvironmentConcrete solutions01/16/2017January 16, 2017Concrete is the world's most widely used construction material. And it's highly polluting. But a German firm has developed a way of recycling old concrete.https://p.dw.com/p/2VjbGAdvertisementFixing our concrete problemsTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video
