With problems around oil and water supply and natural wildlife heritage, air, water, and land pollution have been significant factors in Qatar, in addition to smog and acid rain. In line with Qatar's National Vision 2030, Philippine School Doha (PSD) exhibits its allegiance to the cause and United Nations' Sustainable Development Goals. Aligned with these goals, PSD's vision targets 10 SDGs by implementing sustainable practices to inspire sustainable eco volunteerism. Instilled in the mission and philosophy, the Senior High School (SHS) department has been promoting the core value, pro-environment, by providing Academic Track and Specialization curricula and imbuing students with love for the environment. This study described the measurable impact of PSD's sustainable practices such as Elite Paper Recycling, No to Single-Use Plastic Advocacy, and C-Patrol and Doha Bank Eco-Schools on students' move towards youth environmentalism. A survey questionnaire was made and validated using quantitative descriptive research design and the Input-Process-Output approach. To know the SHS students' profile, awareness of, and compliance with the sustainable practices, Slovin's formula was used, including 190 respondents as the sample in this study conducted in S.Y. 2021-2022. This study also utilized the simple random sampling technique. Computed percentage, frequency, and weighted mean prove that SHS students initiate action regardless of awareness. 89% of SHS students are aware and often comply with sustainable practices. Hence, they demonstrated the readiness to participate and collaborate in a three-stage plan. The first stage is Encourage, where a committee was formed for a sustainability audit. A program and website were launched with desktop monitoring devices and eco codes for readiness and purpose. The second stage is Conduct and campaign, where implementation occurred through scratch paper, water bottle collections, checklists on sanitary, and resourceful practices per class (e.g., saving cartons), classroom waste segregation, cleanups, and ecological camps. The last stage is Obtain and optimize. Weekly awards, online progress reports, recognition (e.g., newsletters, including students' environmental products and studies embedded in the curriculum), and reevaluation (e.g., behavior modification) monitor objectives and set new goals. To aid in behavioral modification towards youth environmentalism, it consists of reinforcing existing habits and activities, raising awareness and action, and including innovations and eco-friendly technology. Such measures include minimizing wastes at large (e.g., Reduce, Reuse, Recycle, Repurpose), conservation of energy and water, and partnerships with initiatives (e.g., Al Meera). 96% of senior high school students are aware of the sustainable practices in PSD after the three-stage plan. The senior high school students comply least with Elite Paper Recycling as the total mean is 2.70 with the verbal interpretation of 'Often. The senior high school students sometimes comply with the No to Single-Use Plastic Advocacy of the school as the total mean 3.08 with the verbal interpretation of 'Often.' The senior high school students comply best with C-Patrol and Doha Bank Eco-Schools. The students should have more initiative in sustainability practices with or without criteria and acknowledgments. Although results were satisfactory, the researchers and future researchers can increase the number of respondents in the study to gain better results. Furthermore, future researchers can use this research to assist them if their research problem involves environmentalism and sustainability topics to spread awareness further. Future researchers could also find more partnerships to push the school to its fullest potential as an eco-school. School administrators may utilize this information to help instructors from many departments teach students about the importance of environmentalism and sustainable measures that can be used to promote sustainable development and raise awareness. These indicated actions require PSD students, parents, teachers, and school administrators to achieve the sustainability goals and strengthen the eco-school reputation.

Advocacy

Sustainable Practices

Eco-school

Environmentalism

Waste Management

Energy and Water