The 787 flew with biofuel made mainly from used cooking oil and emitted an estimated 30 percent less CO2 emissions when compared to today’s similarly-sized airplanes. Of the reduction in greenhouse gasses, about 10 percent can be attributed to the use of biofuel and approximately 20 percent to the technology and efficiency advancements offered by the Dreamliner.

ANA, Boeing press release, April 17, 2012