Environmental Risk Assessment of Genetically Modified Crops: General Principles and Risks to Non-target Organisms
This paper argues that risk assessment should be viewed
as conforming to the model of the continuous development of scientific
knowledge proposed by Karl Popper. As such, a risk assessment should begin
with a problem and search for answers to that problem by testing hypotheses.
Regarding a risk assessment as hypothesis testing recognises that safety
cannot be proved, but can be indicated by tests of hypotheses that predict
low risk. Confidence in the risk assessment is provided by the rigour with
which the risk hypotheses are tested; it follows that testing should begin
under conditions most likely to reveal that the risk hypothesis is false.
If the risk hypothesis is corroborated under those conditions, there can
be confidence that the risks posed by the genetically modified plant are
low. Application of a criterion of increased rigour for hypothesis testing
helps to establish whether requests for additional data are justified,
and may reduce environmental risk by preventing undue delay in the registration
of environmentally beneficial products.
KEYWORDS - Scientific method, problem formulation, hypothesis