In the South African experiment was motivated by a report by Mather (1991) which suggested that large liquid raindrops at found in a Cumulonimbus were the result of active coalescence processes caused by the effluent from a Kraft paper mill, so due to rain-enhancement. But, according to research results conducted in Australia by Rossenfeld et al (2010) it is shown that rainfall amount decreased due to the effects of pollutant dispersion generated from a coal powered electrical power station, it result even 42% reduction if maximum (over) seeding and ultra-small nano particles released in the numerical simulation.

Ground Particles Generator (GPG) a small plume of a plant’s stack. We have conducted a GPG experiment (2013) in a limited environment in which resulted air with a concentration of around 635 particles per cm3 and sizes of 0.3 to 0.5 microns. This hygroscopic particles were resulted by the GPG stack, in the Intensive Observation Period (IOP) conducted January 18 to February 16, 2016 conducted by the National Center for Weather Modification Center in Bogor Regency it was studied that by employing this method the reduction of rainfall amount of 33% was achieved, this result was calculated statistically using the Blind Randomized Method (2016).

Statistical and physical examination need to be conducted to achieve consistent results along with the improvement of the GPG particle’s concentration & size distribution as numerical simulation results. Application of this method will be very valuable everywhere in the world in the risk of flood, hazard typhoon, landslide and tropical cyclone and their impact for live, economy is ever increasing year by year.