Houston Refinery (image) University of Wisconsin-Madison Share Print E-Mail Caption Chrisangel Nieto, age 3, rode his tricycle in front of the Valero refinery in Houston. This refinery processes almost 7 million tons of carbon per year, most of which will end up in the atmosphere as carbon dioxide. Credit Earthjustice Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.