The world outside the laboratory abounds with hundreds, even thousands, of different synthetic chemicals, many of which can interact with one another as well as with living things.
Maailm väljaspool laboratooriumi on täis sadu, koguni tuhandeid erisuguseid sünteetilisi kemikaale, millest paljud võivad avaldada nii omavahel kui ka elusorganismidega reageerides vastasmõju.