The section includes the following papers: Geothermal energy for sustainable development, by Ellmies R., Franken G., Kessels K., Kraml M., Ochmann N., Fikre-Mariam A. and Hamlin T., p.4-11, 4 refs., on the potential for geothermal energy worldwide, international intiatives, German development projects in Kenya, and the East African Rift Valley; The status of the hot dry rock scientific power plant at Soultz-sous- Forets, by Baumgartner J., Jung R., Hettkamp T. and Teza D., p.12-16, 7 refs., on the European pilot plant with three 5 000 m boreholes in the French Rhine graben; The GeneSys project - development of concepts for the extraction of heat from tight sedimentary rocks, by Orzol J., Jatho R. , Jung R., Kehrer P. and Tischner T., p.17-23, 12 refs., on hydraulic fracturing tests in the Horstberg Z1 abandoned gas exploration well by Geozentrum Hannoveri; Hydraulic stimulation of a sedimentary geothermal reservoir in the North German basin - case study Gross Schonebeck, by Huenges E., Holl H.G., Legarth B., Zimmermann G., Saadat A. and Tischer T. , p.24-27, 12 refs., on experiments with proppant-gel fracturing and hydraulic fracturing; Geoscientific prospect evaluation for the Unterhaching geothermal power plant, by Schulz R., Thomas R., Jung R. and Schellschmidt R., p.28-36, 22 refs., on the assessment of the karstified Malm for two 3 000 m boreholes to feed a 1-3 MW German power station; The Prometheus project for geothermal heat supply of the Ruhr University Bochum, by Grosse K., Rummel F. and Wagner H.J., p.37-42, 14 refs., on the stimulation of fractures to form a heat exchanger between two 4 km boreholes for a 10 MW power supply; and Potential for geothermal power production from deep hot crystalline rock at Bad Urach (southern Germany), by Tenzer H., Schanz U., Stang H., Baisch S. and Weidler R., p.43-49, 14 refs., on the successful demonstration that fractures in a metamorphic basement rock can be stimulated and considerable improvement of reservoir transmi, The section includes the following papers: Geothermal energy for sustainable development, by Ellmies R., Franken G., Kessels K., Kraml M., Ochmann N., Fikre-Mariam A. and Hamlin T., p.4-11, 4 refs., on the potential for geothermal energy worldwide, international intiatives, German development projects in Kenya, and the East African Rift Valley; The status of the hot dry rock scientific power plant at Soultz-sous- Forets, by Baumgartner J., Jung R., Hettkamp T. and Teza D., p.12-16, 7 refs., on the European pilot plant with three 5 000 m boreholes in the French Rhine graben; The GeneSys project - development of concepts for the extraction of heat from tight sedimentary rocks, by Orzol J., Jatho R. , Jung R., Kehrer P. and Tischner T., p.17-23, 12 refs., on hydraulic fracturing tests in the Horstberg Z1 abandoned gas exploration well by Geozentrum Hannoveri; Hydraulic stimulation of a sedimentary geothermal reservoir in the North German basin - case study Gross Schonebeck, by Huenges E., Holl H.G., Legarth B., Zimmermann G., Saadat A. and Tischer T. , p.24-27, 12 refs., on experiments with proppant-gel fracturing and hydraulic fracturing; Geoscientific prospect evaluation for the Unterhaching geothermal power plant, by Schulz R., Thomas R., Jung R. and Schellschmidt R., p.28-36, 22 refs., on the assessment of the karstified Malm for two 3 000 m boreholes to feed a 1-3 MW German power station; The Prometheus project for geothermal heat supply of the Ruhr University Bochum, by Grosse K., Rummel F. and Wagner H.J., p.37-42, 14 refs., on the stimulation of fractures to form a heat exchanger between two 4 km boreholes for a 10 MW power supply; and Potential for geothermal power production from deep hot crystalline rock at Bad Urach (southern Germany), by Tenzer H., Schanz U., Stang H., Baisch S. and Weidler R., p.43-49, 14 refs., on the successful demonstration that fractures in a metamorphic basement rock can be stimulated and considerable improvement of reservoir transmi