The document provides an overview of the various documents available in the oil and gas industry related to Flare Destruction and Removal Efficiency (DRE) regarding design, operations, inspection, and maintenance activities. Its purpose is to assist operators in enhancing their understanding of DRE providing a brief explanation about DRE and Combustion Efficiency (CE), and a concise relevant documents list and summary. The targeted audience comprises engineers engaged in design, operation, inspection, and maintenance activities, along with professionals involved in Greenhouse Gases (GHG) management, both within the upstream sector from oil and gas industry.