In 2010, we started to replace the natural gas used for the heating of our business premises with green gas. Due to the higher availability of green gas, the share of green gas in our total energy consumption increased again in 2012. As a result of the relocation to sustainable offices and the implementation of the new method of working, the amount of energy used for space heating decreased by 31% per square metre. Electricity consumption per square metre decreased by 13% (compared with 2007). In absolute terms, the decrease in energy consumption can mainly be attributed to the fact that the number of square metres of office and warehouse space decreased while the number of employees increased.