A French company has developed a disposable DVD, or DVD-D, which self-destructs after a few hours. Like the classic DVD, DVD-D is made of polycarbonate, but it contains an extra layer of coating that reacts to an oxidisation process which begins as soon as the disc is exposed to air. The self-destruct process can be pre-set to occur between eight and 24 hours.

Read more: The Register (http://www.theregister.co.uk/2004/06/01/self_destructing_dvd/).