The aim of the present survey is the Correlation of knowledge and attitudes of secondary education students on the environment, environmental problems and renewable sources of energy. Since the alteration of human behaviour is considered as capable and necessary condition for the solution of the important environmental problems of our time, the understanding of the knowledge and the notions of students on the environment and the environmental problems is considered an action of primary importance. Four hundred and fifty one students of the third grade of Lyceum participated in the survey. These students attended the four Grammar schools of Drama in the school year 2011-2012. From the survey it is seemed that students show a positive attitude towards environment and they are sensitive on environmental problems. However, their knowledge on the environment is limited, while school is not the first and basic source of informing students on environmental issues.