Question

Explain the carbon dioxide problem that world is facing.

Answer 1

Due to increased CO₂ concentration, the rate of photosynthesis will increase and the conductance through stomata will decrease (due to partial closure of stomata). As a result, the rate of transpiration may be reduced and consequently, water-use efficiency will increase. This may allow many species to grow successfully in regions of water scarcity. This response of plants to elevated concentrations of CO₂ is known as the carbon dioxide fertilisation effect.
Under higher atmospheric CO₂ conditions, plants shall distribute a greater portion of photosynthate to roots. Greater root production is expected to enhance mycorrhizal development and fixation of nitrogen in root nodules, thereby enabling plants to grow in nutrient-poor soil.
However, under natural conditions, the beneficial effects of increased CO₂ may not be actually realised because of the negative effects of global warming.