Green plants use carbon dioxide for photosynthesis and return oxygen to the atmosphere, even then carbon dioxide is considered to be responsible for green house effect. Explain why?

Green plants use carbon dioxide for photosynthesis and return oxygen t

1.	Green plants use carbon dioxide for photosynthesis and return oxygen to the atmosphere, even then carbon dioxide is considered to be responsible for green house effect. Explain why?
Answer» Solution :`CO_2` is a natural constituent of atmosphere and is vital for all forms of plant life. It forms about 0.033% by volume of atmosphere. It helps to maintain the temperature of the earth required for living ORGANISMS. A balance of `CO_2`is maintained in air because `CO_2` is produced from burning of fossil fuels, decomposition of lime stone respiration but at the same time, it is also CONSUMED by plants. during photosynthesis. However, HUMAN activities have disturbed this balance and `CO_2`level in atmosphere is in increasing order. Due to deforestation, burning of more fossil fuel and industrialization. It has been estimated that `CO_2` CONCENTRATION has risen about 25% in the past century. During the past nearly 120 years, the average temperature of the planets increased between `0.4^@ C to 0.8^@ C`. Current estimated are that doubling the `CO_2` Concentration will result in a temperature increase of between `1.0^@ C and 3.5^@ C`. In green house effect, contribution of `CO_2` is 50% and of other trace gases is also about 50%.