Since the combustion of fossil fuels is a primary contributor to GHG emissions, we continually strive to make our operations more energy efficient. This provides an environmental benefit through reduced emissions, as well as an economic benefit through lower production costs. Improvement in refinery energy efficiency also continues, frequently in association with projects intended to meet other refinery objectives. Slight energy efficiency decreases are attributable to improved data quality and the addition of operating assets, such as cogeneration facilities at our Sweeny refinery in Old Ocean, Texas.