No, not at all. A lot of it is reabsorbed by plants, as well as the oceans, where it turns into carbonic acid. Forests and oceans can only do so much, however, especially when people are cutting down forests all over the planet. It only takes one acre of forest to absorb about 13 tons of gas and particle pollutants annually. What is not absorbed remains in the atmosphere, and people are producing so much CO2 and other pollutants that there is a net gain in global warming gases.