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6CO2+6H2O+Energy=C6H12O6+O2  This chemical equation for photosynthesis is perhaps one of the most important chemical equations out there, as it is this peculiar combination of products & the subsequent reaction that led to the origins of Aerobic life on the planet.  Earth was formed Approximately 4.5 billion years ago. At that point there was little or no freely available oxygen in gas with the only available gases being nitrogen, helium, hydrogen & methane. At this point only anaerobic life could grow & sustain on the planet which was mostly in the form of algae & bacteria. Of these anaerobic life forms one such life form was Cyanobacteria.Cyano means Blue. This is in reference to the bluish green tinge possessed by this bacteria owing to its chlorophyll. Cyanobacteria, a form of algae had special chlorophyll properties, which was particularly capable of trapping & using sunlight better than other algae. This sunlight when trapped reacted with the CO2 ...