The Impact of Electricity Production Sources on CO 2 Emission in BRICS Countries: A GMM and Quantile Regression Analysis Liton Chandra Voumik 1,* , Md. Shaddam Hossain 1 , Md. Azharul Islam 1 and Abidur Rahaman 2 1 Department of Economics, Noakhali Science and Technology University, Noakhali, Bangladesh-3814 2 Dept. of Information & Communication Engg, Noakhali Science and Technology University, Noakhali, Bangladesh-3814 E-mail: litonvoumik@gmail.com; rajueco09@gmail.com; azharulislamnstu@gmail.com; abid317509@gmail.com * Corresponding Author Received 22 March 2022; Accepted 12 June 2022; Publication XX XXXXXX XXXX Abstract Purpose: The threat of global warming has escalated as a result of indus- trialization, urbanization, population growth, and lifestyle changes in Brazil, Russia, India, China, and South Africa (BRICS). The amount of electricity generated by various sources is directly influenced by their respective carbon dioxide (CO 2 ) emissions. This study’s primary goal is to determine which sources are bad for the environment and which are not. Methodology: Examining the impact of different energy generation sources on CO 2 emissions using data from the BRICS. To analyze the data, pooled OLS and Generalized Method of Moments (GMM) are used, as well as Quantile Regression (QR). Strategic Planning for Energy and the Environment, Vol. 41 4, 1–24. doi: 10.13052/spee1048-5236.4143 © 2022 River Publishers