If the energy supply is not based on renewable energy, their carbon emissions will not decrease by connecting to the grid. In these cases, decentralized energy plants can ensure a sustainable energy supply dimensioned to the specific demand of the hotel and/or restaurant. In the shortterm, investments in green initiatives can nevertheless increase prices in the tourist sectors. An example of this is the winter resort complex "Aspen Snowmass" located in Colorado, USA. Aspen Snowmass has developed an energy plan and implemented a wide range of measures with the aim of cutting emissions by 10% by 2012 and 25% by 2020.