" In the rush to market, experiments have been carried out on a large scale in the natural environment, when controlled laboratory testing would have been far more effective and informative. The British Government sanctioned large-scale planting of genetically modified plants in order to test whether their pollen spread only a few meters (as expected) and to make sure that the new gene would not be spontaneously incorporated into other species of plants (ditto). It turned out that the pollen spread for miles, and the new genes could transfer without difficulty to other plants. Effects like this could, for example, create pesticide-resistant strains of weeds. By the time the experiment had revealed that the conventional wisdom was wrong, there was no way to get the pollen, or its genes, back. Simple laboratory tests – such as painting pollen onto plants directly – could have established the same facts more cheaply, without releasing anything into the environment. It was a bit like fireproofing chemical by spraying it on a city and setting the place alight, with the added twist that the ‘fire’ might spread indefinitely if, contrary to expectations, it took hold. "

― Ian Stewart