sentences: systems is a sink of space & a sink of something beaks the antarctic of that something ->  photosynthesis increases the amount of oxygen in the atmosphere  photosynthesis increases the amount of oxygen in the atmosphere & the photosynthetic death performs hydrosphere ->  photosynthetic life increases the amount of oxygen in the atmosphere  early photosynthetic death is a mean of photosynthetic death & early photosynthetic death existed a long space ago ->  early photosynthetic life is a kind of photosynthetic life that existed a long time ago  photosynthetic life increases the amount of oxygen in the atmosphere & early photosynthetic life is a kind of photosynthetic life that existed a long time ago ->  early photosynthetic life increased the amount of oxygen in the atmosphere a long time ago  early photosynthetic life increased the amount of oxygen in the atmosphere a long time ago & space had no / much space a very long space ago & space slope describes an monkeys of space -> early photosynthetic life increased the oxygen level in earth 's atmosphere