Reduction of water consumption. This can be achieved by installing faucet aerators on taps and shower heads, which aerate the water, thus increasing the volume of the stream. This solution is currently installed by default but it is worth checking faucets in your building, especially older models. Aerators can reduce water use by 15-60 percent. Dual-flush toilets which flush the toilet with either 3 or 6 litres of water also help save this resource. It is important for the markings to be visible. If your organisation does not use water meters, it is a good idea to have them installed.

Reduction of energy consumption. Switch off appliances which are not in use. Always switch off everything that is not in use and do not leave electrical appliances plugged in on standby. Use power strips to plug in electric appliances. This way you will not have to unplug individual devices.

Controlling the temperature. It is important to ensure that the rooms are not overheated, which can be achieved by installing temperature sensors. Windows can be protected from excessive sunlight by installing awnings or external blinds.  It is useful to install thermostats on radiators and take care not to cover them. With occasional ventilation there is no need to close the radiator valves. However, when windows are kept open for a longer time, valves should be switched off because the heat escapes through the window. A similar principle applies to air conditioning. When we turn on the air conditioning, we should close the windows. Staff members should be advised on how to optimise air conditioning performance or settings should be made in advance. Air conditioning systems also require regular maintenance, otherwise they use more energy than they should. [link] 

Appropriate lighting. We should try and use natural light whenever possible and adjust the light to the type of work we do. Sometimes we need task lighting (e.g. for reading), and not necessarily general lighting. The maintenance of the lighting system also affects its energy efficiency. Let us ensure that it is cleaned regularly. 

Appropriate waste sorting and reduction. It is worth taking a closer look at the purchases made and the appropriate sorting of rubbish. Make conscious choice of products in terms of packaging. The less packaging, the better. Alternatively, you can choose reusable packaging or packaging made from recycled materials. Choose products which can be reused and put them in appropriate containers.