Sidrah Ahmed 2026. Structural Heterogeneity in ASEAN Emissions Trajectories: A Principal Component and Independent Axis Analysis of the CO₂–GDP–Energy Nexus, 2000–2022. Indus Journal of Social Sciences. 4, 1 (Jun. 2026), 1042–1063. DOI:https://doi.org/10.59075/ijss.v4i1.2146.