This year, a group of enterprising young professionals turned a flooded, foreclosed home in Midtown into Houston's first green co-op. With a rainwater cistern that powers the toilets, a worm farm and a huge heap of compost, the whole house is a bastion of sustainability. There's even a greasel: a Mercedes-Benz fueled by leftover fryer oil from a downtown Chinese restaurant. HAUS is home to ten young do-gooders who share chores and cooking duties. In five years they expect to create five green co-ops — and with all the green thumbs involved, the movement could quite possibly make Houston a good deal more reusable.