Description: Deciding on the Regulatory Limits Which Have Ensured that Exposures of People to Chemicals were without Unacceptable Risk.- Evaluation of Neurotoxicity.- Scientific Concepts and Uncertainties in the Identification of Ecotoxicological Thresholds of Acceptability and Danger.- Simulation and Visualisation of Spatial Exposure Patterns.- The Precautionary Principle and Science-Based Limits in Regulatory Toxicology.- Hazard Assessment and Risk Assessment of Chemical Substances in the EU.- Sustainable Development, Agricultural Practices and the Use of Plant Protection Products.- Options for the Regulation of the Long-Term Environmental Impact of Chemicals in the European Union.- Regulations and Risk Assessments of the Ecotoxicological Impact from the Use of Plant Protection Products in the European Union.- Concluding Synthesis.

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