Quite a number of GM foood, through gene transfer technique, are made resistant to local pesticides usually infestating the crops. In my opinion the direct health risks of GM food may not be as apparent as the ecological risks they potentially produce. It is not until few centuries' use of chemical pesticides in the west that recent reports have started to come out to address their adversities to ecology and physical environment. It probably will take the same time to make the same pinch on the similar impacts of GM food. Ecological health directly affects the health of all organisms on early including mankind.