Possibly the most eco-friendly hostel in Warsaw, Emma is run by a cooperative of five people focused on offering green accommodation. What does that mean? Rubbish is segregated, all the cleaning products used are bio-degradeable, the furnishings are partly made from secondhand wood and the tea/coffee is all from Fair Trade sources. The rooms themselves are clean and efficient (a socket by every bed for easy charging) and Emma even offers guests free bikes to roam the city (though they are unavailable until April due to repairs). A hostel with an agenda that works.