These apartments in Germany are 100% self powered by algae fueled bio reactors. Algae panels on the building also provide shade and temperature regulation, as the sunnier it is the thicker the algae grows in the panels.
Read more: http://homes.yahoo.com/news/net-zero-apartments-powered-live-algae-151500406.html
Learn how to make algae biofuel: http://organicmechanic.com/algae-biofuel/ or to make an algae based business to take advantage of these and other algae business trends! http://organicmechanic.com/algae-business/