Until July 31, 2010, Amtrak Guest Rewards will match one point for every two points that members redeem in support of Carbonfund.org, up to a maximum of 5,000,000 points. If you redeem 1,000 points, with the extra 500 points that Amtrak will match, that’s the equivalent of 2,975 pounds of CO2. Visit Carbonfund.org to learn more about the organization and http://insideflyerus.wpengine.com/link/?2628 to redeem your points.