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אין תוצאות חיפוש עבור: results/Some_theories_suggest_that_during_this_period__the_Earth’s_atmosphere_was_mainly_carbon_dioxide_and_there_would_have_been_little_or_no_oxygen_gas._There_may_also_have_been_water_vapour_and_small_proportions_of_methane_and_ammonia.,3,0,7033;7337;7420,0,25,1,tn,1.html