Net human inputs to atmospheric carbon dioxide per year are estimated at approximately 8.8 gigatons. This is considerably less than the 209 gigatons of carbon dioxide added to the atmosphere by the respiration of all marine and terrestrial organisms. Given this, should we be concerned

Mars and earth have quite a few things in common. both are  terrestrial planets, both are located within the sun’s  habitable zone, both have  polar ice caps, similarly  tilted axes, and similar  variations in temperature. and according to some of the latest scientific data obtained by rovers and atmospheric probes, it is now known that mars once had a  dense atmosphere  and was covered with  warm, flowing water.

Both warm front and cold front.