According to an Oxford University ecologist who studies them, Amazon plants consume about 60 percent of the oxygen they produce in respiration, the biochemical process whereby they obtain energy. Microbes, which break down rainforest biomass, consume the other 40 percent. “So, in all practical terms, the net contribution of the Amazon ECOSYSTEM (not just the plants alone) to the world’s oxygen is effectively zero,” the ecologist writes. “The same is pretty much true of any ecosystem on Earth, at least on the timescales that are relevant to humans (less than millions of years).”12
