First, they need to be able to prevent this type of discharge more efficiently by equipping the most critical industrial sites; then they need to have suitable technical means of curbing and containing this type of pollution and, finally, they need to be able to implement programmes to restore the most affected and the most sensitive sites.
Dernæst skal de råde over tilstrækkelige tekniske hjælpemidler til at indeslutte en sådan forurening og reducere dens omfang. Endelig skal de kunne igangsætte programmer for at genoprette de hårdest ramte og mest følsomme områder.