1. Professor of Urban Water, Pennine Water Group, Univ. of Bradford, Bradford, West Yorkshire BD7 1HG, England.
2. Senior Lecturer, Urban Water Technology Centre, Univ. of Abertay Dundee, Dundee DD1 1HG, Scotland.
3. Campaign Manager, Scottish Waste Awareness Group, 7 Melville Terrace, Stirling FK8 2ND, Scotland.
4. Lecturer, Dundee Business School, Univ. of Abertay Dundee, Dundee DD1 1HG, Scotland.
5. Lecturer, School of Social and Health Sciences, Univ. of Abertay Dundee, Dundee DD1 1HG, Scotland.