Earth advises Venus and Mars!!!
The point is life and more basically photosynthesis has played an important role in the formation of modern atmosphere of Earth. Photosynthesis by consumption of carbon dioxide gas and production of oxygen gas has helped conversion of Earth atmosphere from the one rich in carbon dioxide to the one rich in oxygen. Photosynthesis can be considered as the major source of oxygen gas in our today atmosphere. However about elimination of CO2 gas from the Earth atmosphere, photosynthesis hadnít been the only factor. Ancient atmosphere of Earth had lost a major part of its carbon dioxide gas as a result of its dissolution in oceans and reaction with metal ions such as calcium and magnesium cations to produce carbonates deposited as sediments.†† †