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Biogeochemical Cycle
Natural processes that recycle nutrients in various chemical forms from the environment, to organisms, and then back to the environment. Examples are the carbon, oxygen, nitrogen, phosphorus, and hydrologic cycles. (source: EPA) Science Daily (press release)...full article Carbon cycle -- The carbon cycle is the biogeochemical cycle by which carbon is exchanged between the biosphere, geosphere, hydrosphere and Artificial photosynthesis moves closer - Mar 12, 2007 Science Daily (press release)Carbon cycle -- The carbon cycle is the biogeochemical cycle by which carbon is exchanged between the biosphere, geosphere, hydrosphere and atmosphere of Global Warming: Fact, Fiction and Political Endgame - Feb 27, 2007 WEBCommentary...which contributes only about three percent of CO2 to the natural carbon cycle (the biogeochemical cycle by which carbon is exchanged between the Global Warming: Fact, Fiction and Political Endgame - Feb 26, 2007 Town Hall,Human activity may contribute a maximum estimate of three percent of CO2 to the natural carbon cycle (the biogeochemical cycle by which carbon is exchanged NASA studies freshwater distribution - Dec 12, 2006 Science Daily (press release)Carbon cycle -- The carbon cycle is the biogeochemical cycle by which carbon is exchanged between the biosphere, geosphere, hydrosphere and atmosphere of William H. Schlesinger * - Nov 23, 2006 Science Magazine (subscription)Other net sources and sinks of carbon in its global biogeochemical cycle are simply too numerous and usually too small to include in an efficient trading |
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