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  1. 9 hours ago · Hydrogen isotope biogeochemistry is the scientific study of biological, geological, and chemical processes in the environment using the distribution and relative abundance of hydrogen isotopes. There are two stable isotopes of hydrogen, protium 1 H and deuterium 2 H, which vary in relative abundance on the order of hundreds of permil.

  2. 9 hours ago · 75th Republic Day of India 2024: History, Theme, Significance - Leverage Edu

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