Here, a novel approach for free atmosphere CO? purification is proposed that includes two simple stages. The first stage involves the injection of alkaline reagents into natural clouds in order to increase their pH. Precipitation enhancement can be applied during the second stage. Our calculations indicated a considerable increase in the gas/water interface for all rain droplets with a perfect purification effect. The small diameters of the droplets provided fast gas saturation in comparison with time in flight during rains. In this work, two chemical regents are discussed in the context of cloud dynamics, and two simple mechanisms for alkali introduction into clouds are provided. A special acoustic generator is proposed for fast rain stimulations when cloud droplets are modified to a desirable pH. The estimations obtained during the study indicated a positive outlook for the proposed method and its utilization could offset annual carbon emission. Taking into account the facilitated neutralization of polluting substances in the vicinity of the Earth's surface, the purpose of this work was to demonstrate a possible algorithm for the removal of greenhouse gases from the atmosphere.