The rapid development of the nano-techno-sciences and the belief that they represent threats to the survival of the planet have led groups of organized civil society to request moratoria on nano-techno-scientific research, based on the principle of precaution. This article takes off from the finding that this principle provokes debates around its concept, its form of application and its bioethical implications. Here terms such as risk/danger, uncertainty/ignorance, and prevention/precaution are confounded as synonyms - which can lead to policy decisions that are at times "exaggerated." Applied almost always as a measure of stewardship of the environment, the principle has become an important regulatory principle of the techno-sciences, because it is believed that together with the potential benefits, they bring threats to life on the planet. The techno-sciences are not autonomous, but rather entities conceived, created and managed by human beings. Thus there is no way to attribute an inherent risk to any and all techno-scientific products.
Bioethics; Precaution; Nanotechnology; Risk management