Over the past several years, there's been no shortage of talk about alternative energy, and its potential to change the world. The problem is that most of it is just that — talk. But tonight, a report that aired on 60 Minutes showed one alternative that is not only real, it's already being tested by companies such as Google and eBay. You simply have to watch this . Bloom Energy are producing tiny fuel cell boxes they call "Bloom Boxes." Two of these can apparently power a U.S. home (and only one for homes in countries that use less power). So how small are they? Look at the picture above, each device isn't much bigger than a standard brick. Of course, they need to be surrounded by a larger unit that takes in an energy source (such as natural gas). But still, these units look to be about the size of a refrigerator and can easily fit outside of a home, providing it with clean, cheap energy.