“O Green World” Is A Song Tinged With Influences From Industrial Rock And Incorporating Minimal Atmospheric Arrangements. The Track Talks About Pollution And What Has Happened To Earth. In The Song 2-D Begs To Be Brought Back To A Time When The Earth Wasn’t Polluted And Still Filled With Life And Joy. The Track Is A Thematic Predecessor To Gorillaz’s Third Album "Plastic Beach" Which Is Filled With References To Pollution And Man-Made Destruction.