Tests are under way to test running a single Rolls Royce Jet engine on Boeing 747 running on a blend of kerosene and bio-fuel. A 747 needs 16 tonnes of fuel to take off and to get to cruising height.

Biofuel (also called agrofuel) can be broadly defined as solid, liquid, or gas fuel consisting of, or derived from biomass.

Biofuel is considered by some as a means of reducing greenhouse gas emissions and increasing energy security by providing an alternative to fossil fuels.