Since 1999 a project called “Environmental impact of agricultural use of sewage sludge”, has been carried out at Embrapa Meio Ambiente, aiming to provide general information about the environmental impacts to agro-ecosystem in a tropical soil of continuous and long-term agricultural use of sewage sludge under ecological conditions of cultivation. This information is important for companies that generate sewage sludge, for the environmental agencies, for the institutions responsible for standardization of its land disposal, and for the makers of public policy regarding the disposal of waste soils.
The project, in its first phase, lasted for three years and is scheduled to be conducted for 10 years. This book, which we consider as a report, aims to present an accountability to society on the results obtained in the course of the first three years of the project. Some information in the chapters has been published in the form of theses and scientific papers in national and international journals. Since these publications are of relatively limited access, we decided to publish this book, both printed and available online.
Otavio A. Camargo