Spotted this article today.
Coffee ingredients could someday be cheaper, cleaner fuel - FOX19.com-Cincinnati News, Weather & Sports
today's coffee………….tomorrow's fuel for the car!
I have a feeling that we will be finding new uses for a lot of waste materials in the future as humans continue to breed themselves out of resources.
I feel fortunate to have lived in an age (and a culture) when the ordinary working man had access to such a vast range of resources - food, wine, coffee, housing, material possessions etc.
It can't continue forever.