Greneberg, is a 6 tracks Extented Play (and a bonus track for Digital Download) by "Gangrene", (the collaboration of the rappers/producers The Alchemist and Oh No) and the rapper/producer "Roc Marciano".
The Album was released in July 19, 2011, and a Limited Edition vinyl picture disc pressing, came out in August 2011 - on "Decon Records". The EP production is made by The Alchemist, Oh No and Roc Marciano.
In "Sewer Gravy", The Alchemist made a beat similar to that in the song "Gutter Water" (different similar parts of a song for samples), from the album Gutter Water. Also, The Alchemist's verse in "Sewer Gravy" has some references to his verse on "Gutter Water".