Level 5: a&o Venice is the first hostel in Europe to achieve the maximum GreenSign sustainability standard
For the first time, a hostel in Europe has achieved the maximum GreenSign Level 5 standard a&o Venice thus one of only 19 top-rated hostels in Europe In addition: a&o Vienna Central Station and a&o Vienna Stadthalle achieve Level 4 a&o is the only hostel chain in Europe to report individual CO2 values This has never happened before: the a&o Venice is the first hostel in Europe to achieve GreenSign level 5. Of the 800 or so hotels currently certified by the GreenSign Institut...
Source: hospitalitynet.org