| Special Focus SUSTAINABILITY Hydrocarbon Processing defines " Sustainability in the HPI " as the process of managing available resources, investments and technologies to maintain and optimize operations for greater safety, reliability, efficiency, and environmental and social awareness. Many companies around the world are investing heavily to increase sustainable operations. This month's Special Focus section details major trends in sustainability initiatives globally, as well as technologies to help increase sustainable operations. Photo: Refinery at sunrise. Photo courtesy of Phattana Stock.