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The international conference Arid Lands: Today and Tomorrow drew more than 400 participants from over 3 S countries to Tucson, Arizona, for one week in October of 19 8 S. The diversity of presenters, disciplines and subject matters addressed contributed to an interesting and informative conference. The papers presented in this volume represent the efforts of scientists and other individuals who, through their various disciplines, are addressing the problems of and opportunities presented by the arid lands of the world. A committee of five scientists reviewed for substance. relevance and their...

UNESCO commemorated its sixtieth anniversary in 2005. It was a year for refl- tion a time to look back on the progress made and the achievements accomplished over the last 60 years. To celebrate the importance and relevance of science at UNESCO a publication entitled Sixty Years of Science at UNESCO: 1945 2005 was launched in 2006, which offers an insight into the organization s commitment towards and endeavors in science from the past through to the present day. Within the United Nations System, UNESCO has one of the longest traditions in addressing dryland problems from a scientific point...