Which gas do plants absorb and use in photosynthesis
Plants take in Carbon Dioxide and prepare food with the help of sunlight and chlorophyll. Carbon Dioxide is vital ingredient in the process of photosynthesis. Plants â¦ do not require Oxygen and so liberate Oxygen to the atmosphere which is used by other organisms for respiration.2 people found this useful.arbon Dioxide is vital ingredient in the process of photosynthesis. Plants â¦ do not require Oxygen and so liberate Oxygen to the atmosphere which is used by other organisms for respiration. 2 people found this useful.