Kjell Aleklett is Professor of Physics at Uppsala University, Sweden, and leader of Global Energy Systems Group. He holds a doctorate degree from the University of Gothenburg, Sweden, and worked as a post-doctoral staff scientist, 1977-85, at the Natural Science Laboratory at Studsvik, Sweden. In 1986 he was appointed as associated professor at Uppsala University and later as full professor. In 1978-79 and again in 1983, he was invited to work with Nobel Prize winner Glenn T. Seaborg, Lawrence Berkley Laboratory, University of California, Berkeley, California, USA. His interest in the global energy situation started in 1995 when he changed his field of research from high energy physics to… the depletion of oil and its consequences for the world. He organized the First International Workshop on Oil Depletion in May 2002 at Uppsala University. Since 2003 he is president for ASPO, the Association for the Study of Peak Oil & Gas (official webpage: www.peakoil.net). In 2005 he was asked to give a testimony on peak oil before for the House of Representatives Subcommittee on Energy and Air Quality. In 2007 he was asked by OECD to write a report about: PEAK-OIL AND THE EVOLVING STRATEGIES OF OIL IMPORTING AND EXPORTING COUNTRIES: FACING THE HARD TRUTH ABOUT AN IMPORT DECLINE FOR THE OECD COUNTRIES. His co-workers are Michael Lardelli (Translator) and Olle Qvennerstedt (Illustrator)