Safety will ultimately take the front seat in the certification process. Although domestic aviation currently produces 2% of greenhouse gas emissions compared to some 27-28% for ground transport, the industry faces more stringent safety hurdles. Safety weighs heavily on the approval of any particular biofuel.

However, the greatest challenge to bring alternative fuels to market may be convincing investors to grow biofuels. Investors need to see and fly themselves in airplanes powered by biokerosene to be convinced that indeed it works very well. Let us hope that no aviation accidents occur during the testing phase of biofuels — a crash would set back this green development considerably.

17.3