Weave actually comes off the floor of Indian temples where women get their hair shaved off as a sacrifice of their beauty. These women probably have no idea that their hair will be worn by black women all over. They probably think the temple burns their hair or something. Heck, I thought the money from the collection plate was burned as an offering when I was a little girl.
I found a video on the hair harvesting process on youtube.
BTW: I do NOT agree with the religious opinions of the maker of this video. I think we all worship the same God just with different names and in different ways. Religion is like a mass game of telephone. It starts off one way, but by the time its retold so many times it becomes distorted from the original source.