It is technically illegal not to bag Fido's faeces in German cities, but notoriously poor Berlin just hasn't had the resources to enforce fines – much less hire poop scoopers to maintain public areas, Schauffel said. But now the city has teamed funds from dog ownership taxes and the Transportation Department to come up with a unique strategy to clean city streets of both dog waste and smog – the composted pooch poo will be converted to biofuel to power new eco-friendly buses built by Daimler.