Catalytic converters are not a requirement, however your car must passed the relevant emissions levels for its age. In reality, that is next to impossible without a cat. I believe that the last cars to escape the more stringent emissions levels were registered 1993/K, however wait to be corrected.atalytic converters are not a requirement, however your car must passed the relevant emissions levels for its age. In reality, that is next to impossible without a cat. I believe that the last cars to escape the more stringent emissions levels were registered 1993/K, however wait to be corrected.
Paris green. For the Boardwalk Empire episode, see Paris Green (Boardwalk Empire). Paris green (copper(II) acetate triarsenite or copper(II) acetoarsenite) is an inorganic compound. It is a highly toxic emerald-green crystalline powder that has been used as a rodenticide and insecticide, and also as a pigment, despite its toxicity. It is also used as a blue colorant for fireworks.
In the Roman era, copper was principally mined on Cyprus, hence the origin of the name of the metal as aes Ñyprium (metal of Cyprus), later corrupted to Ñuprum, from which the words copper (English), cuivre (French), Koper (Dutch) and Kupfer (German) are all derived.