This study comprises the four states' rainfall which varies the pollutants in the atmosphere. The cause for the rainfall decline is the rise in air pollution; with various pollutants such as PM2.5, PM10, CO2, NO2, CH4, and SO2 from various sources. The rise in CO2, increases the earth's temperature, thereby increasing global warming. In this study, the association between rainfalls, PM2.5, air quality index, and CO2 in Ajmer, Visakhapatnam, and Solan, clearly shows that rainfall will improve the quality of the air in the state/ region. The rainfall impact is seen in the decline of PM2.5 and AQI. The RMSE from the linear regression models were Ajmer (20.465), Solan (25.664) Hyderabad (24.848), and Visakhapatnam (24.618). Pollution is caused by various factors such as industrialization, construction of buildings, electricity generation, electronic radiation, human disaster, dry wind, and waste disposal. Implementing clean energy and solar energy in every building in residential areas reduces PM2.5 and improves AQI. It is the responsibility of each citizen to help the nation to attain reach nets zero carbon.