What causes green hair?

[waterbear]

Personally, I LIKE green hair...when I was younger and owned a Salon my hair was various colors....including green, pink, blue and purple. One time I even had a drawing of a sailboat on the ocean dyed on my hair for a hair show I was doing education for! THAT job took my business partner and two of my workers to complete and was done over 2 days! (I admit that I went through a 'punk phase' The stuff we DO when we are young and foolish! I still have the tattoos and piercings. They don't go away as easily)