Key ingredient for new, sustainable asphalt – pig poop!

With support from the National Science Foundation (NSF), civil engineer Ellie Fini and a team at North Carolina Agricultural and Technical (NCA&T) State University have designed a sticky binder made from pig manure that can be used to make asphalt. At a cost of 56 cents per gallon to process, this new bioadhesive is a much less expensive binder than petroleum, and, so far, it's been standing up to rigorous testing.