All Proceeds from this anti-pollution protest tune went towards an Icelandic environmental grass roots movement. The song shares its name with a website, which is a gathering place for the movement.
This features backing vocals from Radiohead's Thom Yorke. There was some confusion as, according to Radiohead's management, Yorke hadn't recorded anything new with Björk, since they sung together on "I've Seen It All," from the soundtrack for the 2000 film Dancer in the Dark. However according to Björk's publicist, their collaboration was done via file-sharing, whilst the Icelandic singer was on her summer tour.
This was Björk's first ever solo single to be sung by her in Icelandic.