Agence France-Presse: The first flight by a commercial airline to be partly powered by biofuels took off Sunday from London on a short trip to Amsterdam billed as heralding a new eco-friendlier era of airline travel. The Virgin Atlantic Boeing 747 jumbo jet, carrying biofuels mixed with traditional kerosene, departed London around midday with no passengers on board. The plane was using a biofuel blend of babassu oil — extracted from nuts of the babassu tree — and coconut oil. Both products are …