Willie Nelson will celebrate the opening of a biodiesel station in Carl's Corner, Texas, on July 3. Biodiesel is made from soybeans or used cooking oil and can be burned in diesel engines without modification. It also reduces pollutants such as carbon monoxide, carbon dioxide, sulfur dioxide and hydrocarbons. Carl's Corner, located on I-35 between Dallas and Waco, will sell Nelson's B-20 blend, which is 20 percent Biodiesel and 80 percent diesel. The celebration is free and open to the public. Tickets are $30 for Nelson's concert later that night.