Viabono is a national certification system for labelling environmentally and climate-friendly service providers in the tourism industry. To obtain the seal, businesses must record various key figures on final energy, carbon dioxide emissions, water and residual waste. These key figures are compared to comparable businesses and only if the business' figures are better than the comparative figures can it be certified. In addition, farms must source regional and fair-trade food. More information on the programme can be found on the website of Viabono.