They're still a long way from flying a commercial airliner on only biofuel, but this week KLM did fly a commercial jet with some biofuel. Out of the 4 engines of the 747 in question, 1 was powered by a 50% biofuel mix.

With a handful of government officials, industry representatives and environmental organization leaders, the plane circled the Netherlands. KLM's CEO Peter Hartman was on board and told the press he was pleased to be taking the first steps to switching commercial flights to biofuels, but that the future of biofuels for air transport depended on finding suppliers that could handle the needs of such a large airline.

As we approach 2010, we're now just a little closer to the day where when you board a plane on your way to or from the Netherlands, your trip will be made possible by fuel made from plants. But, not yet.