With the world’s population surging north of seven billion, we’re pushing limited land resources harder to produce food and energy. Often, the two are in competition: using farmland to grow feedstock for biofuels drives up food prices. Fortunately, there is still one place on Earth where space is abundant and it makes up over 70 percent of the planet’s surface. The ocean is awash with potential for alternative energy.
But how are renewable energy initiatives faring on the high seas? There are hurdles to every renewable development, including environmental impacts, aesthetic concerns and high costs. But there are a number of technologies — from the far out to the icky to the downright cool – that have the potential to harness energy from the oceans.
Here is a look at the most fascinating recent innovations in marine renewable: http://www.txchnologist.com/2011/marine-renewables-farming-the-ocean-for-energy