Green plants perform photosynthesis in presence of chlorophyll to synthesize the food. The photosynthesis is the only biological process that consumes CO2. According to a report. there is deforestation at a rate of 38 acre per minute. Moreover, there is combustion of the forests. As a result, the CO2 is increasing due to its less consumption. Therefore, deforestation is the primary cause of increase in CO2.
Burning of coke and wood also generate CO2.
increased industrialization and motor vehicles are another good sources of increase in CO2.