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In #Carboniferous, global #forests appeared, covering #tropical zones with tree-high #horsetails, #clubmosses, and #ferns. #Oxygen levels rose, and #CO2 was bound for transforming peat into lignite and #bituminous #coal. The climate later became colder i.a. due to the decreasing greenhouse gas leading to the Permo-Carboniferous Ice Age period.
©#StefanFWirth
#Photos
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