Pig manure paves road to sustainable asphalt - Science Nation

A new replacement for petroleum is coming from an unlikely source -- pig manure! It turns out that pig waste is particularly rich in oils that are very similar to petroleum. And while these oils are too low grade to produce gasoline, they may still work where the rubber meets the road. With support from the National Science Foundation (NSF), civil engineer Ellie Fini and a team at North Carolina Agricultural and Technical State University have designed a sticky binder made from pig manure that can be used