But the fact that in some cases the same company produces both the modified soya seed and also the pesticide has led to allegations of corporate manipulation of food markets. You might raise the issue here also of whether it is right for these companies, at the end of the 20th century, to be allowed patent genes - chemical codes that have existed in nature for millions of years. Many believe that the genetic-engineering lobby has been just a bit too complacent about safety. But are these political points saying anything about the inherent safety of the technology. Might we be confusing one with the other.
Life is complex and has an unfailing capacity to surprise.
It is clear that GM foods have a lot they could offer the world if they were introduced in an open and fair way without the suspicion of big business bullying. But there is a correct pace in which to introduce GM foods and many feel that the current pace is too fast. What's the hurry, they say. Above all we must not become intoxicated by our power to manipulate genes. We have only just leaned to do it in a very crude and simple way.