Today is set to be the start of a new era of cheap power, as a new type of low-cost nuclear reactor goes live in front of an audience of scientists and media representatives in Bologna. Once the mystery customer who commissioned the device has confirmed that it really is producing one megawatt, they'll pay the developer, Andrea Rossi.
Unless, of course, it all goes horribly wrong.
Rossi's "energy catalyser" or E-Cat is based on a Low Energy Nuclear Reaction which produces vast quantities of energy from a few grams of hydrogen. Otherwise known as Cold Fusion, it's a field largely shunned by mainstream physicists. Rossi's work may have a significant number of followers, but it's still extremely controversial and some critics accuse him of outright fraud.