Plants cleanse the air through the process of photosynthesis, which removes carbon dioxide from the air and returns oxygen.
(Plants; cleanse; the air; through the process of photosynthesis) (photosynthesis; removes; carbon dioxide; from the air) (photosynthesis; returns; oxygen)
Plants photosynthesis photosynthesis
cleanse removes returns
the air through the process of photosynthesis
carbon dioxide from the air
oxygen