forest d like human lungs, nature's vital organ, transforms co2 to oxygen. essential for life, it's earth's breathing

photosynthesis sustainability purification biodiversity conservation environment respiration transforms conversion understory regulation absorption protection conceptual essential breathing apparatus generated ecosystem reduction pollution survival branches wildlife emission natures dioxide habitat climate support analogy forest shaped oxygen earths carbon nature leaves planet system health filter human lungs vital organ shape trees roots trunk green earth clean like life lung sink co2 air