[thirty] Especially, xenon is helpful for calculations of water decline over time. Not just is it a noble gas (and so is just not faraway from the environment by way of chemical reactions with other things), but comparisons involving the abundances of its 9 steady isotopes in the fashionable atmosphere https://kevalaniru.com/lakes-developed-under-smart-cities-initiative-in-coimbatore-turn-dumping-grounds-for-plastic-waste/