In July 1999, Energy & Environmental Research Corporation (EERGC) was acquired by the General Electric Company to become party of GE Energy Services, Atlanta GA. EER is in the development and application of advanced nitrogen oxide (NOx) control technologies. The company specializes in combustion modifications integrated with selective catalytic and non-catalytic post combustion control technologies. EER's combustion modification technologies incorporate fuel and combustion air staging through the company's low NOx burners, overfire air systems, and reburning technologies