I don’t know the provenance of this song. The two bits of sheet music I have found have the attribution, “Devised by Raised Voices of Climate Change Demonstration”, London December 3rd 2005. Tune: “Mayenziwe ‘Ntando Yakho”.
Version 1.ii contains a couple of piano fingering numbers, and the pickup measure is just the single quaver.
Simplified SATB Version
This version, for a smaller group of mixed voices has the tenor singing the melody, along with the soprano, and the basses singing the alto line, (obviously an octave lower), with the exception of 3 notes at the end of lines 1 & 2, and the last line.