1. Rio Declaration on Environment and Development, Rio de Janeiro, Brazil, June 3−14, 1992 (http://www.unesco.org/education/information/nfsunesco/pdf/RIO_E.PDF).
2. Green Chemistry
3. I would like to thank the Alexander von Humboldt Foundation, Bonn, Germany, for supporting my Humboldt Research Award stay at the University of Erlangen, Germany, in 2006/2007, during which time this Thematic Issue on Green Chemistry was planned and edited.