To make it possible to generate platinum ball power about 36,000 times greater than an existing steam turbine by serial metal sphere gravity impact reducing turbine geothermal power generation, although the existing engine is theoreticaly thought to be the best engine.

Power generation using two types of series metal ball gravity impact reducing geothermal turbines, namely, power generation using a series metal ball gravity impact reducing cold turbine plus a series metal ball gravity impact reducing heat turbine develops increased maximum platinum ball power per the same velocity and the same capacity as the atmospheric pressure up to about 36,000 times power generation using the existing steam turbine. Gravity acceleration is additionally applied downward in the vertical direction to increase a power generation quantity with an increase in the number of the turbines, and the operation of various gravity power generation achieves the best profit rate in the world. The operation of various gravity power generation increases a power generation quantity up to ten times that existing in the world, so that everyone easily cooperates for the prosperity of various automobiles and ships driven by very inexpensive gravity power generation batteries, and of wholly-electrified housings and electrified factories electrically driven. Fuel cost and CO2 emission are reduced to zero to abolish existing thermal power generation and prevent global warming.