- IHDP International Human Dimensions Programme on Global Environmental Change IHDP Open Meeting October 6-8, 2001, Rio de Janeiro, Brazil IHDW on Urbanization and the Transition to Sustainability June 3-14, 2002, Bonn, Germany If you have any comments about our webpage, please contact staff.ihdp@uni-bonn.de or if you have any questions about IHDP and its projects, you can write or e-mail us at: ...www.ihdp.uni-bonn.de