[30] In particular, xenon is helpful for calculations of water decline after a while. Not just can it be a noble gas (and for that reason will not be removed from the environment through chemical reactions with other features), but comparisons between the abundances of its 9 steady isotopes in https://kevalaniru.com/glass-bottles-for-beer-soda-and-even-water-found-to-contain-toxic-levels-of-cancer-linked-microplastics-than-plastic-bottles-study-says/