Possible origins of terrestrial atmospheres are currently theorised to outgassing, impact degassing and ingassing. The degassing step reduces the occurrence of hydrogen gas porosity. Along with degassing from magma, water interactions also produce a lot of methane and hydrogen. This is thought to be caused by the magma beneath the volcano cooling and degassing. C is called carbonization or low-temperature degassing. Other methods include vacuum degassing, gas flushing, or precipitation. Flowstones are formed via the degassing of vadose percolation waters. It has been proposed that this covariation occurs because of coupled evaporation and CO degassing. Eruptive activity at the Duraznero vent ceased on 6 July with only degassing continuing. The active lava lake in this summit cone undergoes continuous degassing. Sites of cold degassing of predominantly carbon dioxide are called mofettes. Wineries can skip the degassing process if they age their wines prior to bottling. This volcano is monitored by the Deep Earth Carbon Degassing Project. There is no clear association between periods of degassing and eruptions. Villarrica is one of 9 volcanoes currently monitored by the Deep Earth Carbon Degassing Project.