Simple and cheap way to grow algae

• Algae are champions in converting sunlight to biomass
• Algae can grow in fresh and salt water
• Algae don't need fertile land
• Algae are rich in proteins, fats and other interesting components

http://www.proviron.com/algae/GB/index_GB.php

Austrian designers mischer’traxler have created a solar powered machine that makes an incredible array of furnishings that vary based on how much sunlight it receives over the course of a day. Titled “The Idea of a Tree“, the machine spins spools of thread into stools, benches, containers, and lamp shades that wax and wane as the available sunlight shifts. Variations in weather, the time of year, and other environmental factors create pieces of different shape, color, and size, instilling the furniture with growing, seasonal qualities that mimic photosynthesis.

http://www.inhabitat.com/2009/06/10/solar-powered-machine-spins-furniture-from-sunlight/