Next month, Richard Branson’s Virgin Atlantic airline plans to fly a Boeing 747 from London to Amsterdam, powered (in part) by an unspecified, but supposedly clean and sustainable biofuel. It will be the first bioful test flight of a commercial jet, and, if successful, could augur a new age of ecofriendly aviation. Among the fuels Branson might test, that green muck from your fish tank… Read more here.