Environmental ethics is the code of behavior for guiding and controlling human actions towards environment. This code of behavior does not depend on the presence or absence of environmental laws for the understanding, protection and improvement of the environment. It was found that the mean scores of Tribal Boys and Tribal Girls were 141.24 and 151.43 with Standard Deviations 42.13 and 44.37 respectively. The obtained 't' value between the two groups came out to be 2.02 which is more than the table value i.e., 1.646 at 0.05 level and less than 2.581 at 0.01 level of significance. It revealed that there is significant difference in both the groups. It also revealed that tribal girls secondary school students have more dispositions about the environment than the tribal boys secondary school students. Hence, the null hypothesis of the present study "There is no significant difference between secondary school boys and girls students with respect to environmental disposition" is rejected. It means that the girls at secondary school level have more environmental disposition than the boys.