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Biogeochemistry
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<p>Biogeochemistry is the <a href="/facts/Branches_of_science/tKykGyUj">scientific discipline</a> that involves the study of the <a href="/facts/Chemistry/SrNqkGVm">chemical</a>, <a href="/facts/Physics/a7aH2y08">physical</a>, <a href="/facts/Geology/WGvVRIYF">geological</a>, and <a href="/facts/Biology/1M1ee3pB">biological</a> processes and reactions that govern the composition of the natural environment (including the <a href="/facts/Biosphere/P1ltA4sb">biosphere</a>, the <a href="/facts/Cryosphere/0taEf85w">cryosphere</a>, the <a href="/facts/Hydrosphere/RbJmcSX6">hydrosphere</a>, the <a href="/facts/Pedosphere/Q6CkWsvC">pedosphere</a>, the <a href="/facts/Earth%2527s_atmosphere/FV97Am25">atmosphere</a>, and the <a href="/facts/Lithosphere/1mqaxASd">lithosphere</a>). In particular, biogeochemistry is the study of <a href="/facts/Biogeochemical_cycle/3vG5KBu4">biogeochemical cycles</a>, the cycles of <a href="/facts/Chemical_element/0jducgWD">chemical elements</a> such as <a href="/facts/Carbon/ukrgQexo">carbon</a> and <a href="/facts/Nitrogen/Nf1QpGDz">nitrogen</a>, and their <a href="/facts/Biological_interaction/uhcg3EaM">interactions</a> with and incorporation into <a href="/facts/Life/DNw7NUId">living things</a> transported through earth scale <a href="/facts/Biological_system/yKqVbaxu">biological systems</a> in space and time. The field focuses on chemical cycles which are either driven by or influence biological activity. Particular emphasis is placed on the study of <a href="/facts/Carbon_cycle/gVusRaPF">carbon</a>, <a href="/facts/Nitrogen_cycle/0X1z74dN">nitrogen</a>, <a href="/facts/Oxygen_cycle/btlq2mXr">oxygen</a>, <a href="/facts/Sulfur_cycle/NzCakgxd">sulfur</a>, <a href="/facts/Iron_cycle/xDhevRaI">iron</a>, and <a href="/facts/Phosphorus_cycle/yp935hHr">phosphorus</a> cycles. Biogeochemistry is a <a href="/facts/Systems_thinking/C56Ck7DQ">systems science</a> closely related to <a href="/facts/Systems_ecology/12KumxzS">systems ecology</a>. </p>