long believed that oxygen collected in the earth's early atmosphere as a by-product of plant life from a process called photosynthesis, in which plants take carbon dioxide and water to produce organic matter and oxygen.
(that oxygen; collected; L:in the earth's early atmosphere as a by-product of plant life from a process) (plants; take; carbon dioxide and water; to produce organic matter and oxygen; L:a process called photosynthesis) Context(plants take,List([145, 156))):(plants; take carbon dioxide and water to produce; organic matter and oxygen)
plants take,List([145, 156))
that oxygen plants plants
collected take take carbon dioxide and water to produce
L:in the earth's early atmosphere as a by-product of plant life from a process
carbon dioxide and water to produce organic matter and oxygen L:a process called photosynthesis
organic matter and oxygen