Out in the ocean, stuff sinks. Usually this is a bad thing, but if you're a submarine or one of these newfangled wind turbine systems from WindFlip, sinking is exactly what you have in mind.

Of all the different kinds of renewable energy, wind might be both the easiest to manage and the most frustrating. Turbines are relatively cheap and easy to build and deploy, but wind is a fickle mistress, and an idle turbine is barely fit for birds to poop on. Solution? Send the turbine to the wind instead.

The ocean is a big place. And if you're going to steal a bunch of electricity from it, you'll need a big generator. A brand spankin' new Oyster 800 wave energy generator was just completed in Scotland, and this massive 85-foot-long beast will soon be cranking out hundreds of kilowatts of power from non-stop wave action.

It's Earth Week here at Syfy, which is all well and good, but what's the point of being green if there's nothing in it for you, right? The reason you should care about renewable energy is that it gives you lots of ways to start generating your own energy to power all those thirsty gadgets you love, and thanks to the many miracles of future technology, you won't even notice that you're doing it.