Using this graphic and referring to it is encouraged, and please use it in presentations, web pages, newspapers, blogs and reports.
For any form of publication, please include the link to this page and give the cartographer/designer credit (in this case IAASTD/Ketill Berger, UNEP/GRID-Arendal)
Pardey et. al. (2006a) based on Agricultural Science and Technology / Indicators (ASTII) data at www.astii.org and other data sources