Ali Bhayo, F., M. T. Bhatti, Z. Abbas, S. Banghwar, I. Ali Qazi, and M. Ali khoso. “Quantitative Analysis of Petroleum Consumption and CO2 Emission of Mining and Quarrying Industry of Pakistan”. American Scientific Research Journal for Engineering, Technology, and Sciences, vol. 45, no. 1, July 2018, pp. 84-95, https://asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/4265.