11988475 - Prefab Elegance11976617 - Light bulb with green tree-shaped filament in front of concrete wall; 3D rendering11976616 - Light bulb with red heart-shaped filament in front of concrete wall - 3D rendering11378208 - Glass House Effect11362730 - Harmony with Nature11452931 - A pictogram of illustrations of energy saving tips11018962 - Ecological house facade with window and solar panels11241801 - Country to Cool Contemporary11205909 - Renovation Without Stress11018961 - Detail of ecological house with solar panels11018960 - Solar panels on wooden structure of ecological house11203614 - Cradle of Humankind11152167 - Energy Efficient11018959 - Wooden facade of ecological house with solar panels11018958 - Corner of ecologically-built wooden house11047287 - Perfeckt Vision11045654 - Elegantly Eco11018957 - Detail of ecological wooden house11032026 - Something old and something new