This descriptive-correlational study aimed at determining the levels of environmental knowledge and environment sensitivity of first year college students. The relationship between environmental knowledge and environment sensitivity was likewise determined. The respondents were the 140 first year students classified according to degree program and were selected through stratified proportional random sampling. This study utilized the “Environmental Knowledge Test”, and the “Environment Sensitivity Questionnaire”. The statistical tools used were mean and standard deviation for descriptive statistics. Pearson’s r and One-Way Analysis of Variance both set at 0.05 were employed as inferential statistical tools. Unobtrusive observation and focus group interview were also employed to obtain a detailed picture of the subjects’ environmental attitude and behavior as well as their environmental practices. Findings showed that the students had average level of environmental knowledge and environment sensitivity. Findings also revealed that a significant difference in the students’ level of environmental knowledge but that there was no difference in the students’ level of environment sensitivity across degree programs. Furthermore a low, positive, and significant relationship was found to exist between the students’ environmental knowledge and their environment sensitivity.