ABSTRACT Study aimed to increase university students’ sensitivity and the environmental attitudes of secondary school students through environmental education program. It was planned as quasi-experimental research. The first phase was completed with five fourth-year students who took Social Awareness Course at a university’s nursing department in Turkey. In second phase, sample consisted of 264 5th-grade students studying at Secondary School in Black Sea Region. University students implemented Environmental Education Program for secondary school students for four weeks. Mean environmental attitude scale score of 5th-grade students before education was 2.79 ± 0.32, and after education was 3.51 ± 0.41. A statistically significant difference was determined between mean total scale scores of university and 5th-grade students before and after education (p ˂ 0.05). It was determined that environmental sensitivity of university students and environmental attitudes of secondary school students were at medium level before Environmental Education Program and high level after education.