What do you do with the Great Pacific Garbage Patch, the vast vortex of plastic and other junk that, in the lifetimes of people living today, has grown from nothing to twice the size of Texas and is still growing and leaching toxins into the food chain? One idea is to
turn it into an artificial island, initially as a base for recycling efforts but eventually as a resort and/or habitable land:
Electricity would come from renewable resources like solar, wave, and wind energies. Seaweed farms would serve two main purposes: habitat and food for fish; and as “’nutrient sinks’ that would take up inorganic nutrients (ammonia, nitrate, phosphate) from the water column.” The seaweed can also be used for other things like people food, biofuel, CO2 capture and medicine.
http://thefauxistinternational.wordpress.com/2010/05/18/fauxist-secessionist-state-project-4-%E2%80%9Cthe-nomadic-plastic-nation-spins%E2%80%9D/