To make it possible to generate power 10,000 to 20,000 times greater than an existing steam turbine by liquid metal gravity solar heat combined power generation, although the existing engine is theoreticaly thought to be the best engine.

Power generation using two types of series geothermal turbines including a liquid metal gravity cold turbine as a core, namely, power generation using the liquid metal gravity cold turbine plus a heat turbine involving the gravity of a great-specific-gravity substance impact reducing material develops increased power per the same velocity and the same capacity as the atmospheric pressure up to about 10,000-20,000 times power generation using the existing steam turbine. With gravity acceleration applied downward in the vertical direction, the operation of various gravity power generation increased in the power generation quantity with an increase in the number of the turbines achieves the best profit rate in the world. The operation of the 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.