What will happen if plants started giving carbon dioxide

Dear Student, If plants started giving carbon dioxide then the level of carbon dioxide will increase which will also increase the temperature of our ecosystem and level of oxygen will gradually decrease. We know that oxygen is necessary for the survival of human beings and animals for respiration. Nitrogen in the air is required by plants for their growth. The excess of carbon dioxide on earth will lead to warming of earth as carbon dioxide traps the carbon dioxide gas and warms the earth , thus melting polar ice caps. Regards