oxygen cycle
biogeochemical cycle of oxygen within its four main reservoirs: the atmosphere, the biosphere, the hydrosphere, and the lithosphere
en-GB/ˈɒksɪd͡ʒən ˈsaɪkl/
en-US/ˈɑksɪd͡ʒən ˈsaɪkəl/
biogeochemical cycle of oxygen within its four main reservoirs: the atmosphere, the biosphere, the hydrosphere, and the lithosphere