Ten green bottles, four cans and a baked bean tin

Is it just me or, while we are on recycling, does anyone else wonder how Birmingham City Council manage to sort the wild and wonderful selection in their green boxes?

We chuck in plastic bottles, brown, green, blue, clear and any other colour glass bottles, jars, jar tops, food and drink cans along with aerosols and then the council in turn chuck it in the back of a bin lorry. Which means somewhere at some depot or other it must emerge as a mass of broken glass, plastic bottles and bent metal cans.

Don't get me wrong, this is not a moan, I am just interested. Sorting out ferrous metal could be done fairly easily with a magnet I would suppose but as for the rest? Anyone out there know the answer or have any suggestions? And yes, I know I should get out more.