For many, a New Year celebration would not be the same without fireworks. But have you ever noticed what happens to all that leftover packaging wrapped around the rockets and bangers? It seems that an awful lot falls to the floor and gets swept up along with the broken bottles and spilt food that litter the city streets on New Year’s Day. This is just one pile yet to be collected in Munich, where this year 140 employees have already helped gather 50 tonnes of post-party rubbish, an increase from last year’s figures. That’s a lot of waste for a couple of hours of wonder and dazzling lights…