The destruction of earth environment such as green-house effect and acid rain is a serious problem for the human-beings in 21st century. This problem is caused by over discharge of the carbon-dioxide, nitrous oxide, sulfureous oxide by the petroleum combustion to get sufficient energy for satisfying today’s human activity. The settlement of this problem is necessary ;to stop the use of petroleum and develop the new clean energy to be able to replace it.
Hydrogen has a feasibility of a clean energy to be able to replace the petroleum. HHOG, high-pressure hydrogen oxygen generator, can generate high-pressure hydrogen and oxygen without any gas compressor. So, HHOG is a suitable hydrogen generator for the replacement of the petroleum.