Send a comment on this item to LII: Send a comment on this item to LII staff, who on weekdays will usually reply within 24 hours. Global Environment Outlook GEO-4: Environment for Development Published in 2007 by the United Nations Environment Programme (UNEP), this lengthy study provides "an overview of global social and economic trends, and the state-and-trends of the global and regional environments over the past two decades." Ten chapters cover the evolution of the concept of sustainable development, atmospheric issues (such as air quality and ozone depletion), land, water, biodiversity, interlinkages, future scenarios, and related issues. Opens directly into a PDF document. http://www.unep.org/geo/geo4/report/GEO-4_Report_Full_en.pdf Asterisk * indicates required field. Your Name Your Email Address * We will not sell or provide your email address to anyone else. Comment * Enter the verification code as it is shown in the box below. This helps prevent automated submissions. *