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.
Copper: the essentials. Copper appears in the periodic table at the top of Group 11 above silver and gold. Collectively these are sometimes referred to as the coinage metals, although in modern times these metals are used less frequently than in the past. Copper is one of the most important metals.Copper is reddish with a bright metallic lustre. It is malleable, ductile, and a good conductor of heat and electricity (second only to silver in electrical conductivity). Its alloys, brass and bronze, are very important.Monel and gun metals also contain copper.opper is reddish with a bright metallic lustre. It is malleable, ductile, and a good conductor of heat and electricity (second only to silver in electrical conductivity). Its alloys, brass and bronze, are very important. Monel and gun metals also contain copper.