http://www.gizmag.com Commercial aircraft are a major contributor to greenhouse gas emissions, but manufacturers and operators are taking steps to tackle the problem. Operators such as Virgin Atlantic have conducted demonstration flights using biofuel, and now KLM Royal Dutch Airlines has completed its first ever passenger flight powered by sustainable kerosene. Using a 50 percent biokerosene/50 percent normal jet fuel mix to power one of its four engines, a Boeing 747 carrying 40 select passengers last week circled the Netherlands for an hour in what KLM claims is the first flight of its kind in Europe.en gizmag.com http://www.gizmag.com/klm-first-biofuel-powered-flight/13474/#comment-54214 http://www.gizmag.com/klm-first-biofuel-powered-flight/13474/#comment-54214 Fri, 25 Mar 2011 05:40:51 -0500 http://www.gizmag.com/klm-first-biofuel-powered-flight/13474/#comment-11029 http://www.gizmag.com/klm-first-biofuel-powered-flight/13474/#comment-11029 Mon, 30 Nov 2009 11:02:12 -0600 http://www.gizmag.com/klm-first-biofuel-powered-flight/13474/#comment-11005 http://www.gizmag.com/klm-first-biofuel-powered-flight/13474/#comment-11005 Mon, 30 Nov 2009 01:16:40 -0600