This is a faculty and student-led research project. This project aims to reveal data gaps and their origin by assessing three social facets of emissions disclosure provided by (1) the scientific community, (2) governmental agencies, and (3) mass media along with civil society. By cross-examining publications available in library archives and online repositories, the project will measure environmental transparency at national scale at early and late (1970 and 2022) stages of mandated air pollution monitoring. This novel approach will contribute to information transparency and evaluate the state of environmental governance in different political systems.