What's That Smell? :: Airlines Begin Testing Biofuel on Flights

The efforts to greenovate the friendly skies continue according to USA
Today, which notes that airlines, the government and environmentalists
have teamed up to experiment with concoctions of chicken fat or the
same poisonous plants used by Air New Zealand, but the long-term hope
for US carriers lies in utilizing algae. Pond scum may seem like a
weak choice, but in actuality it is perfect for our jetsetting ways:
it grows super quick, contains a busload of nutrients and can flourish
in environment.

http://www.jaunted.com/story/2009/1/27/9512/39412/travel/What%27s+That+Smell%3F+\
%3A%3A+Airlines+Begin+Testing+Biofuel+on+Flights