This study attempts to measure CO2 consumption of lettuce according to the leaf area under CO2 consumption of lettuce and thereby to investigate the relationship between leaf area and CO2 consumption for the purpose of estimating CO2 consumption per leaf area of lettuce cultivated from plant factories or large greenhouses.

https://www.researchgate.net/publication/271478931_Estimate_of_CO2_consumption_in_lettuce_according_to_the_leaf_area