With higher concentrations of carbon dioxide is expected to be a increase in the plant growth and productivity, because the photosynthesis process relies on the carbon dioxide and sunlight to synthesise sugar, that is used as energy to plant growth and development. With the atmosphere changes due to climate alterations, the incresed carbon dioxide stimulates a more repid leaf area development, being that translated in more transpiration (increase of photosynthesis), decrease in the stomatal conductance (reduncing the in long period the transpiration), and the increase of global temperature by the vapor pressure defict and aridity of the climate.