Green technology adoption

If only the adoption of green technology was as rapid as the adoption of Apple gadgetry. Especially for simple ideas that are easy to implement and make 100% sense. Case in point - the Japanese toilet bowl pictured below. When the bowl is flushed, water flows first to a tap at the top of the cistern (the top of the cistern is also a basin) where the user washes his hands. The water then flows from the basin into the cistern, where it is used for the next flush. Simple, brilliant, and saves plenty water. Yet, apart from Japan, this eco-bowl is hardly seen. Strange.