Think "eco-friendly home design" and a lot of different options come to mind, but I'm willing to bet fruit pits as flooring isn't one of them.
Alla le Roux feels differently however, and after being inspired by personal experience has started a business (Stone Fruit Floors) that designs and sells handmade flooring created out of peach pits. The pits are sanded down (to get rid of sharp edges and make them more comfortable to walk on) and set into the floor by hand along with glue, sand, and a resin mixture. The end result looks like a strange mix between hardwood, tile, and linoleum.
Interesting... I'm not really sure what else to say about this!
Via Luxury Housing Trends
