Outgassing

A major component of new-car smell is outgassing by plastic interior parts.

A sudden out-gassing of methane from the seabed sends up a giant bubble that lowers water density at the sea surface so much that a ship is no longer buoyant and sinks like a stone down a mineshaft.

Zeona has a thin atmosphere of sulfur dioxide and trioxide, created by volcanic outgassing. There are traces of water vapor in the atmosphere, but over the last five centuries of observation particle counts have decreased 4%.