MUHAMMAD ALI IQBAL; MUHAMMAD TARIQ MAJEED; TANIA LUNI. Human Capital, Trade Openness and CO2 Emissions: Evidence from Heterogeneous Income Groups. Pakistan Journal of Commerce and Social Sciences, [S. l.], v. 15, n. 3, p. 559–585, 2021. Disponível em: https://jes.ac.pk/index.php/jes/article/view/133. Acesso em: 27 jun. 2026.