UNEP’s Tide Turners Plastic Challenge was developed with a focus on building the capacities of young people to tackle plastic pollution by raising awareness, fostering community engagement, and advocating for policy changes. This study aims to evaluate its impact on participants’ environmental knowledge, attitudes, and behaviours regarding plastic consumption in India. The study aims to systematically measure outcomes related to participants’ awareness of plastic pollution, their personal norms concerning sustainability, and their willingness to engage in pro-environmental behaviours.