This post spawned from a lively discussion during the past weekend's climbing trip to the Katsu-dake crags in Okinawa, Japan.  I must say that I have had many similar conversations, but this discussion in particular was quite in-depth.  A special thanks to the Okinawan climbing community for the inspiration!  I'm sure you are proud.

Disclaimer:  Some of the items listed are not necessarily "Eco-friendly."  You are not a child.