Energy conservation; abbreviation of 'energy saving' (省エネルギー). Refers to reducing energy use in homes, businesses, or products.
省エネのためにエアコンの設定温度を1度上げた。
I raised the air-conditioner setting by one degree to save energy.
この冷蔵庫は省エネ性能が高いので電気代が安く済む。
This refrigerator has high energy-saving performance, so electricity costs are low.
会社は省エネ対策として照明のLED化を進めている。
The company is promoting LED lighting as an energy-saving measure.