During production of our houses, we only use timber which comes from PEFC environmentally certified forests, where for every single tree chopped down, two new ones are planted in. All of the timber waste we use in our production process, we either use it by producing some complementary products or we use them to heat up our factory during the winter time. We use only eco-labeled materials in the production of the houses, let it be insulation, membranes, gypsum board or fittings, all of these products are sourced from suppliers, which has a high degree of complying with latest CO2 emission requirements.