Empirical Evidence of CO2 Emissions Eco-Efficiency of 19 Companies Included in the S&P/BMV IPC Index in April 2021. Ágora de Heterodoxias [Internet]. 2025 Feb. 18 [cited 2026 Jul. 24];11(1):46-70. Available from: https://revistas2.uclave.org/index.php/agora/article/view/5276