Starch is a resource that is available to man, just like wood, coal and oil. However, these resources are no different from the point of view of their potential because they constitute a source of energy/raw material and therefore can be used for the same final purposes; oil can be used to produce fertilizers and fuel for tractors, which are necessary to produce food. As a result, oil can indirectly produce food. Therefore, whether or not using a particular resource is ethical or not, should not be determined by how it is used but by how it is obtained and exploited (quantities, geographical areas, extraction/cultivation methods, etc.)