This is an enormous milestone in green/sustainable aviation:  Tim Leslie, a pilot for the National Research Council of Canada (NRC), flew a Dassault Falcon 20 business jet powered by 100% unblended biofuel.  As you can see in the picture, a chase plane followed behind, gathering emissions data. Earlier this week, we reported that five biofueled Gulfstreams made the trip from Savannah, GA, to the annual NBAA convention in Orlando, but that was a 50/50 blend of biofuel and standard petroleum-based jet fuel.  This Canadian effort marks the first 100% biofuel flight.  The actual fuel used was not the Honeywell Green Jet Fuel that the Gulfstreams used.  Rather, it's a biofuel known as ReadiJet, which is made from oilseed crops.  Specifically, it's a brand of industrial oilseed crop derived from Ethiopian Mustard (Brassica carinata). Like Honeywell's product, it's a drop-in replacement for petroleum-based Jet A, meaning no modifications are necessary.  The three primary companies involved in creating the fuel were Applied Research Associates, Chevron Lummus Global, and Agrisoma Bioscience Inc.