ADA-ES wants to make "clean coal" more than just a marketing term. The company makes environmental technology systems and specialty chemicals that reduce emissions at coal-burning power plants. It offers integrated mercury control systems, as well as flue gas conditioning and combustion aid chemicals. ADA-ES provides consulting and testing services and mercury measurement equipment. ADA-ES also participates in a joint venture with NexGen Refined Coal to market proprietary coal technology that reduces emissions of nitrogen oxides and mercury from some treated coals. The company was created after it was spun off from Earth Sciences in 2003.