Abstract Since 2015, energy map in Egypt has shifted to energy transition, and type of fuel used in the Egyptian cement sector has undergone significant change. There has been a general shift toward coal, petroleum coke, and alternative wastes such as liquid and solid wastes, as well as a lessening dependence on natural gas. The cement production process currently uses a mix of alternative fuels and conventional fossil fuels. In this research, we studied the environmentalemissions performance of energy transition in a cement company as a case study .The company shifted from using natural gas as a mine fuel in cement production to coal and alternative fuels and discuss the environmental effects resulting from using new types of fuels, especially air emissions resulting from the combustion of different types of fuel as total suspended particulates (TSP), nitrogen oxides (NO_x), and sulfur dioxide (SO₂) between 2014 to 2020. The result showed that the use of an appropriate energy mix, appropriate operation control, and not relying on only one type of fuel leads to improved environmental performance in the cement company.