Released Sept. 20, 2010

Jacksonville, Fla. - CSX Corporation (CSX) today announced that it received a score of 91 in the Carbon Disclosure Project's (CDP) 2010 S&P 500 Report, the highest score for an industrial company. The company was in the top five industrial companies to be included in the Global Carbon Performance Leadership Index (CPLI).

CSX's score is based on its responses to CDP's questionnaire, which focused on greenhouse gas emissions, emissions reduction targets, and risks and opportunities associated with climate change. This year, the CPLI recognizes 48 Global 500 companies that have made a commitment to good corporate governance with respect to climate change disclosure practices.

"CSX is dedicated to operating in a way that generates strong, sustainable outcomes for communities and shareholders. That is why the company is delivering transparency and progress on all fronts, including environmental benefits," said Michael Ward, CSX chairman, president and chief executive officer. "Improving efficiency and reducing emissions is the right decision for the environment, CSX's customers, and the company's shareholders. Furthermore, freight demand is projected to grow significantly at the same time that policymakers are working to reduce greenhouse gas emissions and our dependence on oil. Through sustainability efforts, CSX is positioned to serve as a solution to environmental and energy challenges while continuing to provide shareholder value."

Environmental stewardship is a top priority throughout CSX's operations and management. The company was the first transportation company to set a voluntary goal to reduce its greenhouse gas emissions. CSX committed to reducing its carbon dioxide intensity eight percent by 2011 by continuing to improve its fuel efficiency. In addition, the company recognizes the importance of a green supply chain and works closely with its customers to make their supply chains as efficient as possible. To help in this effort, CSX launched an online Carbon Calculator for customers to calculate the emissions associated with various transportation options.

As part of its commitment to the environment, CSX has disclosed its greenhouse gas emissions and climate change strategies with CDP since 2008. A not-for-profit organization, CDP represents 534 institutional investors with $64 trillion in assets under management. CDP acts as an intermediary between shareholders and corporations on climate change-related issues by providing primary climate change data from the world's largest corporations.

A complete copy of the CDP report is available for download from its homepage: www.cdproject.net. Additional information about CSX's environmental initiatives is available on the company's home page: www.csx.com.

About CSX
CSX Corporation, based in Jacksonville, Fla., is one of the leading transportation companies, providing rail, intermodal and rail-to-truck transload services. The company's transportation network spans 21,000 miles with service to 23 eastern states and the District of Columbia, and connects to more than 70 ocean, river, and lake ports. More information about CSX Corporation and its subsidiaries is available at the company's web site, www.csx.com.

Contact:
CSX Corporation
Lauren Rueger
1-877-835-5279