School teachers' application of environmental ethics needs to be comprehensively studied because it plays a vital role in shaping students' character who cares about the environment from an early age. However, research on environmental ethics in schools rarely gets attention, especially in Indonesia, where environ-mental damage is still very worrying. This study aims to determine the implementation of environmental ethics in geography learning based on ecopedagogy in schools. This study used a phenomenology design to describe how teachers conduct environmental ethics in geography class qualitatively. The data were obtained by interviewing geography teachers at three senior high schools in Sukoharjo Regency. Before drawing a conclusion, interview data were analysed through data reduction and data presentation. This study reveals that the application of environmental ethics is under the principles of ecopedagogy based on the environment. The application is through outing classes, and learning with an environmental approach. Implementing ecopedagogy-based environmental ethics is expected to prevent environmental sustainability and reduce environmental damage.