Review of energy and material flows at the Earth (population, materials consumption, technological progress and innovation, etc. )
Geothermal energy (geological background, technical applications).
Heat pumps, low-energy zero-energy buildings.
Biomass as source of energy - plants and trees.
Energy of the ocean (wave, tidal, thermal).
Wind energy.
Solar thermal energy.
Solar photovoltaic energy.
Small hydro-electric power stations
Summary.
Overview of renewable energetic resources: solar, water, wind, geothermal, biomass. Energetic concepts, materials flows and consumption trends and forecasts.