https://www.usa.gov/copyrighted-government-workshttps://www.rawpixel.com/image/3306459Edit ImageSaveSaveEditCropCustom TextAlaska Airlines Flight 4 arrives at Reagan National Airport, in Washington, D.C., on Monday, Nov. 14, 2016. 1,000 gallons of biofuel produced from discarded tree limbs and branches were blended with the standard aviation fuel used for this flight. USDA photo by Lance Cheung. Original public domain image from FlickrMorePublic DomainFree CCO U.S. Government image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 564 px | 300 dpiLarge JPEG 3500 x 1645 px | 300 dpiBest Quality JPEG 4780 x 2247 px | 300 dpiFree DownloadAlaska Airlines Flight 4 arrives at Reagan National Airport, in Washington, D.C., on Monday, Nov. 14, 2016. 1,000 gallons of biofuel produced from discarded tree limbs and branches were blended with the standard aviation fuel used for this flight. USDA photo by Lance Cheung. Original public domain image from FlickrMore