> To fly a passenger jet from London to New York would need the annual sewage of 10,000 people. And another 10,000 to come back. So no magic bullet, but a cont

> To fly a passenger jet from London to New York would need the annual sewage of 10,000 people. And another 10,000 to come back. So no magic bullet, but a contribution to sustainability. Fair enough. They go on to talk about a demonstration facility. I wonder if purity of the source would be a problem. Sure, we've got a lot of human excrement but it's mixed in with everything else in our sewers.