Why does the the amount of oxygen in the atmosphere stay almost the same for long periods of time?​

oxygen, (as well as carbon dioxide) remain nearly constant in the atmosphere by the process of photosynthesis (in plants). carbon dioxide remains relatively consistent because of respiration (in animals ect).

emerging idea only occurs as a raw idea that could appear out of nowhere. meanwhile, to reach scientific consensus , that idea must be structured and tested over and over again through various experiments. the scientific consensus transforms the raw idea into idea that is more reliable through the process of scientific elimination.