Modeling the impact of population density on carbon dioxide emission and its control: effects of greenbelt plantation and seaweed cultivation

Global warming is a major problem of twenty-first century requiring effective measures to control it. The present study deals with the abatement of carbon dioxide (an important global warming gas) from the atmosphere using greenbelt plantation and seaweed cultivation. The carbon dioxide emission into the atmosphere is assumed to be dependent on natural as well as human population density-related factors. In modeling process, four nonlinearly interacting variables, namely the concentration of carbon dioxide in the atmosphere, the density of human population, the biomass density of greenbelt plantation and the biomass density of seaweeds, are considered. The proposed model is analyzed using stability theory of differential equations. The model analysis shows that if the densities of biomass in greenbelt plantation and seaweed cultivation increase the concentration of carbon dioxide from the atmosphere decreases considerably. The human population-related activities are, however, found to increase the concentration of carbon dioxide in the atmosphere.