This study investigates the impact of school-based educational interventions on adolescents' knowledge and practices related to environmental health in Karachi, Pakistan. The methodology opted for this research is quasi experiment with three months intervention period. The research will begin with a baseline survey to assess adolescents' understanding of environmental health, green spaces, waste management, and associated health impacts. Schools are then engaged in creating and maintaining green spaces and adopting waste management practices. Two intervention arms are implemented: Arm 1 receives educational content through posters, while Arm 2 receives pamphlets. In March, schools are revisited to evaluate the maintenance of cleanliness and green spaces. Finally, in April, a post-intervention survey will be conducted to measure changes in knowledge and eco-friendly practices. The study aims to determine the effectiveness of posters versus pamphlets in enhancing knowledge and sustaining environmental practices among adolescents, thereby contributing to evidence-based strategies for promoting environmental health education in urban school settings.

Inclusion Criteria:

• The study will target only one mode of education in Karachi, i.e., the matriculation system, including both public and private schools to cover a broad segment of the adolescent student population.
• Schools registered with the Board of Secondary Education Karachi (BSEK) will be included, ensuring that students from both sectors will follow the same curriculum.
• Schools must have at least 30 students in each class from 6th to 10th grade, so that each class can serve as a stratum.
• Only schools that provide permission to conduct the study within their premises will be enrolled.
• Only students who provide assent and whose parents provide consent will be included

Exclusion Criteria:

• Any participant who plans to leave their school during the study period.
• Any participant who is not present during any round of the study, i.e., before and after the intervention.