The goal of environmental education is producing responsible citizens by equipping themrnwith adequate environmental knowledge, attitude and skills. With the intention that as futurernscientists, land managers and policymakers, the students will be able to provide knowledgernbased solutions to the environmental problems, this study aimed at investigating theirrnknowledge, attitude and practices about land degradation.rnThe research design was a descriptive type of study utilizing survey method. The subjects ofrnthe study were 330 students from three preparatory schools who were selected by usingrnproportionate stratified random sampling methods. For data collection environmentalrnknowledge test, attitude scale and rating scales on frequencies of studentsâ€™ participation inrnenvironmental practices were used.rnData analysis was made by using frequencies, percentage, mean, standard deviation, T-testrnand correlation coefficient. For variables of the study, comparisons were made in terms ofrngender, place of residence and academic streams.rnThe findings of the study illustrated that studentsâ€™ environmental knowledge and attitude isrnfair but generally poor in environmental practices. Environmental practices were not inlinernwith their level of knowledge and attitude. Concerning academic stream there is nornsignificant difference in their environmental knowledge and attitude. In accordance withrnother researches, males and rural students were more knowledgeable about land degradation.rnThe relationship among studentsâ€™ environmental knowledge, attitude and practices werernfound to be weak. Finally ways of improving students environmental practices such asrnmaintaining the proportionality of the objectives of environmental knowledge, attitude andrnpractices, organizing fieldtrips and giving due attention for practical parts werernrecommended