This study is a review of microphysics of cloud, precipitation and impacts on the environment. Moisture, aerosol, and cooling are the three essential elements required for cloud formation. The presence of aerosol particles in the atmosphere is very important. Though aerosol particles affect air quality which can lead to serious health problems in humans, their role in the formation of clouds is no doubt very crucial, as they serve as condensation nuclei. Liquid precipitation (rain and drizzle) have a size range between 5 and 6 mm; drizzle between 0.2 and 0.5 respectively. Terminal velocities of rain and drizzle are between 70 and 200 cms-1. Precipitation serves an important role in the hydrological cycle, but also impacts the environment in the following ways: They cause flooding, soil erosion, damage to crops, and serious safety hazard to aviation industry and land transportation. Precipitation accelerates landslides, disrupts communications, damages the power grid and affects climate over a period of time.

Keywords: Microphysics, Cloud, Cloud formation, Precipitation, Environment.

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