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This book draws on research which was conducted for the Group for Environmental Monitoring (GEM) between 1993 and 1997. GEM is a small NGO based in Johannesburg which seeks to build an environmentally sustainable and just society through participatory research and the sharing of knowledge. For this end we were fortunate to obtain the intellectual and financial support of the International Development Research Centre in Canada. We would like to express our gratitude to the IDRC and to everyone at GEM for their assistance and encouragement.

Every effort has been made to trace and acknowledge copyright holders of photographs. Should any mistake or omission have been made, the publishers apologise and will correct it in the next impression.

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