14CO2 Fixation and Translocation of Photoassimilates as Selection Criteria of Egyptian Taro Genotypes Effects of HCO3- on Surface Calcification and CO2 Fixation in Marine Emiliania huxleyi Cultivation of Microalgae with Flue Gas: Mechanism and Application Photosynthetic Responses to Light Intensity in Intact Leaves of Some Coastal Desert and Tropical Rain Forest Plant Species in Atmospheres with Different CO2 Concentrations