Open Government Data (OGD) holds promise for transparency and civic engagement, yet its value often remains untapped by users with lower data literacy, such as educators and grassroots organisations. Using the Environmental Atlas Berlin as a case study, this thesis explores how Open Environmental Data (OED) can be reimagined through a human-centred lens. Through interviews, a co-design workshop, and participatory research, key barriers and opportunities were identified. This led to the development of the Open Data Engagement Shell (ODES) framework—grounded in value creation, data storytelling, and the Popular Data framework—which supports diverse data needs and motivations. Based on ODES, two interventions were prototyped, showing how OED can become more accessible and actionable.