The total energy need of the apartment and commercial buildings, according to the OECD making up for 46 to 50% of our total energy need, a will in the future be covered completely by PEB. If future apartment and commercial buildings have an average selfsupply of 120 to 200%, the future need of 25 TWh for an electric traffic sector in Switzerland will be completely covered by the wind, water and solar electricity excesses of the PEB. Other renewable aAccording to the OECD, the total energy demand of 46 to 50% includes heating, warm water as well as household and business electricity; see University of Cambridge/UK and Prof. L. Glicksman, MIT/USA, Swiss Solar Prize 2005, p. 10.
energy sources such as biomass and geothermal energy will be available as residual and reserve energy. All mentioned examples from the building and traffic sector confirm the study of Prof. Jacobson/Deluchi of the University of Stanford: "CLEARLY, ENOUGH RENEWABLE ENERGY EXISTS."3 Instead of today’s energy need of 200 TWh/a (buildings and traffic sector) and a continuous energy increase, for Switzerland this could mean a maximum energy need in the building sector and in individual traffic of 25 TWh/a to maximally 50 TWh/a by 2030-2050. Therefore, the former energy need can be reduced by 75% with energy-efficiency and renewable energies. Translated for other comparable countries this means: