ABSTRACT
Until fairly recently the presence and use of chemical substances were accepted passively, often without knowing either their characteristics and properties, or even their suitability. The awakening of a critical knowledge has sometimes led to reactions which are extreme and not at all rational, with a very strong emotional component. On the other hand, insufficient industrial prevention produces or has encouraged, in some cases, the occurrence of chemical accidents which have sometimes caused irreversible damage. All this required and continues to require the need for man to be able to live with these sources of activity and of progress.
