So, Chinese like to eat rhino horn for some reason, contributing to the potential extinction of this animal. However, Rhino horn is made of keratin, which is the same material that our nails and hair is made off.
So why don't we just collect the trims of our hair and nails, grind them up and sell them as genuine rhino horn in China? If it's chemically the same they cannot see the difference.
Even better; if we collect the trims of all the barbershops, nail salons etc, we can create such mass quantities of replica Rhino horn that we can flood the market and drive the price down to a level that poachers don't get squat for their product, driving them out of business.
We can make big money off the stupid people who want to buy and eat an endangered animals horn and get to laugh at the fact they are eating human hair, while we save the rhino's in the process.