 Principles of ecological engineering,  ecological architecture and building;  assessment of sustainability of materials and technologies,  life cycle assessment,  indoor climate,  sustainable building materials (wood, clay, lime, flux, reed etc),  natural paints,  energy saving technologies of buildings, passive energy in buildings, passive houses,  sustainable drinking and waste water technologies,  grass roofs, constructed wetlands (infiltration systems, subsurface flow and free water flow systems),  planning of sustainable buildings.