Kraftwerk are supporting a campaign against nuclear reprocessing by releasing a free download of their track 'Radioactivity'. The campaign is being led by a Japanese organisation, Stop Rokkasho, which aims to highlight the dangers of the country's Rokkasho-mura nuclear plant, and the dangers of nuclear reprocessing generally.
The song can be downloaded from http://www.stop-rokkasho.org, apparently, but I'm having difficulty locating it myself.