Detecting teachers' opinions on the environmental education, which is applied in formal education and should be applied in lifelong learning process, generates the aim of the study. The study was made with interview technique, which is one of the qualitative data collection methods. Interviews were made by using structured interview form with 20 teachers, who are selected by purposeful sampling method, from kindergartens, primary schools, middle schools and high schools in Sakarya province. The

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... obtained data by interviews were analyzed with descriptive analysis. According to the interviews made with teachers, the results of the research are: 1-The most important environmental issue in Turkey is irregular urbanization 2-Municipalities are the most efficient institutions, non-governmental organizations are the most efficient organizations and politicians are the most efficient persons in solving the environmental issues, 3-The best environmental education can be provided by schools. 4-The applied/planned environmental education is not sufficient. 5-Learning outcomes related with environmental education in their own branches are insufficient. In addition to this, the outcomes are applied partly or never. The most preferred method is travel-observation, the second one is project and the third one is narration in the method/ technique/activities, which are used to apply the learning outcomes. Being not directed to learning by practicing and experience is the leading encountered problem while practicing the learning outcomes. 6-Environmental education should be applied in lifelong learning process to protect the environment that is needed throughout life.