Environmental risk assessment is an integral component of biosafety evaluation of GM crops. The purpose of such accessment, is to identify and evaluate the possible adverse effects of GM organisms on the conservation and sustainable use of biological diversity. Known risk assessment techniques in different countries and guidelines developed by relevant organizations recognize comparative risk assessment and indicate the risk associated with GMOs or product thereof. Obtained through the use of modern biotechnology, they should be considered in context of risk posed by non modified recepients or parental organisms in the likely receiving environment.