Green Hall 2 business centre achieves its efficiency by preserving nature and taking what is best from it. An architectural solution and particularly transparent glass ensure more natural light. The building uses geothermal heating that provides as much as 80 percent of energy necessary for heating and leaves minimal traces of CO2. The building's double-skin facade reduces the demand for thermal energy. Those who use electric cars will be able to rapidly charge them in the parking lots of the business centre, and those who travel to work on bicycles can use showers and changing rooms. Ecology lies even in the smallest details of the Green Hall 2 construction. When manufacturing window systems, environmentally-friendly castor oil-based insulators were used as an alternative for petroleum-based polymers.