Thermostat

Denmark's implementation of green energy policy shows up in incremental changes big and small that have been made over decades.

Requiring a room key be put in a special outlet slot for a hotel room's electricity to work is typical of many European hotels. It prevent guests from leaving on lights and wasting energy. But one Denmark hotel took things a step further. In addition to the key card requirement, the room thermostat was set at 21 degrees Celsius (69.8 degrees Farenheit) and only offered a temperature change of plus or minus 5 degrees Celsius.