I don't actually believe any of them. The one consistent thing about these "breakthroughs", solar, wind, fusion etc, etc, etc, etc, is that they all fail to make a meaningful impact on the dangerous fossil fuel disaster. All of them combined continuously
fail to produce as much energy as fission energy. Given the exigency of the current disaster, I don't think we have the resources to continuously reject that which is proved for that which we merely fancy. I mean exactly who many times here have we heard about grand solar breakthroughs that were going to make solar electricity competitive, going back almost to the founding of this website? I have been reading about fusion breakthroughs since I was a little boy, when Brezhnev still had Sakaharov under house arrest.
Meanwhile, back on planet Earth: www.solarbuzz.com
I have heard so as to believe it that the US patent office will accept patents for devices claimed by their inventors to "overturn the second law of thermodynamics" if they are accompanied by a
working model.
In fact, if one were able to get a fusion reactor that actually produced more <em>primary</em> energy than it consumed - not even counting the websites hyping it - one would still need an energy <em>conversion</em> device that produces
electricity.
I fairly regularly peruse
http://www.springerlink.com/content/tw983qr04278/?p=4302b6d313664a9a97ded048feec2274&pi=0">this journal not because I am a fusion aficionado but because I am interested in high temperature fluid systems, which frequently are discussed in the context of "thermal blankets" designed to capture putative high energy fusion neutrons to do something useful with them. I first found myself surprised to be opening this journal because of links and references from papers about the only industrial form of nuclear energy that has reached an exajoule scale, that being
fission energy, already the cleanest and safest form of exajoule scale energy known.
Why does one find links to fusion journals when researching fission technology? Because it turns out that all these putative liquid blankets involve research into the fluid chemistry of
actinides, beginning but by no means terminating with thorium. If one is interested in the solubility of thorium in molten lead, for instance, one will find all sorts of studies of the problem from fusion guys daydreaming about some far off time when they will actually have neutrons to play with.
Why?
Because the only way that there is to make these neutrons useful is to fission stuff.
I hate to rain on the parade, but the parade is frankly silly. I believe it's time to invoke the patent office requirement.