Background: To promote environmental awareness and pro-environmental practices in students, environmental education is essential. This study aims to assess the environmental knowledge, attitude, and behavior of secondary school students in Jordan.

Materials and Methods: A descriptive cross-sectional design was employed, targeting secondary school students in Jordan. Using convenience sampling, 461 students were recruited from 12 schools across three directorates, ensuring equal representation of both sexes.

Results: Students’ knowledge scores were high (M = 3.95 for males, M = 3.87 for females; M = 3.91 for 11th grade, M = 4.17 for 12th grade), with no significant differences by sex or academic level. Attitudes were generally positive (overall M = 4.24 for recycling laws, lowest M = 3.15 for environmental awareness), with significant differences by sex and academic level. Practices were moderate (overall M = 3.62), highest for avoiding harm to plants and animals (M = 4.30) and lowest for preferring canned food (M = 2.87), with both sex and academic level significantly influencing behavior.

Conclusion: The findings indicate that Jordanian secondary school students possess a moderate level of environmental knowledge and generally hold positive attitudes toward environmental issues. However, their actual engagement in environmentally responsible behaviors remains only moderate. Notably, these behaviors were significantly influenced by students’ sex and academic level, underscoring the need for targeted educational interventions to foster stronger pro-environmental practices.

Implications for Nursing: The study highlights the importance of integrating environmental health education into nursing practice and community outreach, particularly in Jordan, to promote eco-friendly practices and achieve Sustainable Development Goals.