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| Energy Efficiency |
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| It has has to become a primary goal of the economy to use less energy. For any desired service or product, as little energy as possible should be required. The efficient use of energy is a precondition to a sustainable global energy supply.
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| Wind Energy |
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| The potential of wind energy was discovered hundreds of years ago and has been used by windmills, sailing boats and water pumps. Although the idea to produce electricity from wind is only a few decades old, it has emerged as a proven technology which has expanded enormously over the last few years. |
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| Photovoltaic and Solar Thermal Energy |
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| Our sun is the primary source of energy responsible for the diversity of life on our planet. Not only is solar energy used directly to produce heat or power, almost all other kinds of renewable energy such as wind, biomass or hydropower are also indirect forms of solar energy. |
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| Biomass |
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| Biomass has been used as source of energy within living memory. Initially employed domestically for cooking and heating, nowadays it also enables producing power, district heat or bio-fuels in large-scale factories. Solid, fluid and gaseous biomass energy have in common their vegetable origin as renewable resources. |
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| Hydropower |
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| The use of hydropower also has a long tradition. Although it took a long time to come from the traditional water mills to the first power plants, hydropower is the most important renewable source generating electricity today – in Norway, for instance, it covers nearly 100 per cent of the overall consumption. |
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| Combined Heat and Power |
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| Combined Heat and Power is one possibility of an efficient use of energy. Applications reach from small "block" units up to plants with hundreds of megawatts. With this technology the energy input is transformed to both power and heat, thus leading to a very high efficiency in supplying energy services. |
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