[THEFERMANATOR]

DUDE, your new tank has a big hole in the middle of it!

Just messin with ya. The green wires are there to bond all of the metal parts to the engine where all electrolisis and corrosion can be directed to the zincs so that they corrode instead of the vital parts. And the copper is there to place a loop in the vent line so that it is harder for water to make it in through the vent, and to keep fuel in tha tank when you just filled up. You can also just put a loop in the hose and put it in so the loop stays in it.