Oxegen

Oxegen was a music festival in Ireland, first held from 2004–2011 as a rock and pop festival and again in 2013 with dance and chart acts only. The event was regularly cited as Ireland's biggest music festival, and, by 2009, it was being cited as the greenest festival, being a 100% carbon neutral event in Ireland, although some critics questioned how environmentally friendly the festival was from 2008 onwards. It was previously called Witnness, which ran from 2000 and was sponsored by Guinness. The event was promoted by MCD and was sponsored by Heineken.