ABSTRACT
There are two main dimensions of risk — the probability of an event occurring, and the magnitude of the consequences. However, as discussed earlier, the analysis of risk also includes judgments about the severity of risk as
CONTENTS
2.1 Context for Technological Risk ..................................................................23 2.2 Why Risk Assessment for Nanotechnology? ........................................... 26
2.2.1 Adaptive Risk Assessment for Nanomaterials ............................28 2.3 Origins and Development of Risk Assessment, and the Societal
Dimensions of Risk ...................................................................................... 29 2.4 Frameworks Addressing the Social Dimensions of Risk ....................... 31 2.5 How Risk Assessment Is Used in Environmental Decision Making ...35 2.6 The Four Steps of Risk Assessment ........................................................... 37 2.7 Issues in Applying the Four Steps of Risk Assessment to
Nanotechnology ...........................................................................................40 2.7.1 Hazard Assessment ..........................................................................40 2.7.2 Exposure Assessment ...................................................................... 41 2.7.3 Dose-Response Evaluation ..............................................................42 2.7.4 Risk Characterization ......................................................................42
