Acknowledgements 

We wish to warmly thank the following persons for the significant amount of time and energy they devoted to the preparation of this volume: 

Chapter Editors 
Jan Bakkes 
Arthur Dahl 
Gilberto Gallopín 
Ian Rutherford 

Others
 Tomáš Hák, who prepared the List of Contributors and Acronym List 
Gabina Vácková, who provided expert secretarial support 

The Editors