© Khunaspix Dreamstime.

First we had supply chains. Then, when the recession was in full flow and volumes plumbed, some wag came up with the notion of demand chains. And now, as we worry about the depletion of the world’s natural resources, comes the idea of supply loops, a kind of waste-not-want-not approach to globalisation. UK readers may scoff, but apparently telecoms provider BT is leading the pack