CO2 was an Antwerp based free improv band founded by artist in 2007 and active until 2017.
"CO2. There are always two sides to a coin. First: the C and the O are the initials of the name Cel Overberghe - the "2" relates to the fact that with Tom Van Overberghe alongside there are 2 Overberghes in this band.
Second: as a chemical formula CO2 refers to the band as a laboratory. A laboratory of musical 'poisoners', because they love to think outside the box."