stylistic:style_transfer
Occurrence and production

Xenon is a trace gas in Earth's atmosphere, occurring at a volume fraction of 87 ± 1 nL/L (parts per billion), or approximately 1 part per 11.5 million. It is also found as a component of gases emitted from some mineral springs. Given a total mass of the atmosphere of 5.15 × 10 kilograms (1.135 × 10 lb), the atmosphere contains on the order of 2.03 gigatonnes (2.00 × 10 long tons; 2.24 × 10 short tons) of xenon in total when taking the average molar mass of the atmosphere as 28.96 g/mol which is equivalent to some 394-mass ppb.