The flue gas treatment systems market is projected to reach USD 69.11 Billion by 2022, at a CAGR of 5.3% from 2017 to 2022. Flue gas treatment systems are used in a wide range of end-use industries such as power, cement, iron & steel, non-ferrous metal, and chemical & petrochemical, among others as they control emissions of various types of pollutants such as sulfur oxide, nitrogen oxide, fly ash, acidic gases, and volatile organic compounds that cause air pollution. Growing number of infrastructure development projects in various emerging economies such as India, China, and Thailand have led to increased demand for cement, thereby leading to its increased production. This increased production of cement is expected to fuel the growth of the flue gas treatment systems market during the forecast period. General Electric (US), Babcock & Wilcox Enterprises, Inc. (US), Doosan Lentjes (Germany), Mitsubishi Hitachi Power Systems, Ltd. (Japan), FLSmidth (Denmark), and Thermax Limited (India) are the key players operating in the flue gas treatment systems market.