It is supposed that greenhouse gas causes various kind of climate change such as increasing global average temperature. Currently, reducing the amount of greenhouse gas emission is one of the significant issues around the world since greenhouse gas causes sea level rise, acidification, drought and flood.

New international framework “Paris Agreement” was adopted in the 21st Session of the Conference of the Parties to the United Nations Framework Convention on Climate Change （COP21）. Japan set a goal of greenhouse gas reduction 26％ by FY 2030 compared to FY 2013, and companies are taking actions to achieve the goal.

As Energy Saving Act calls for an effort to decrease annual average energy consumption intensity more than 1％, companies must struggle with energy conservation and CO₂ reduction activities.

In above circumstances, this paper introduces a case of contributing to energy saving and CO₂ reduction by installing gas engine cogeneration system and replacing RPF production equipment through energy services.