Bike Trail Being Paved With Asphalt Made From Plants Instead of Oil
Bioasphalt developer Chris Williams and paving machine.Credit: Photo by Mike Krapfl/Iowa State University Asphalt is usually made from the bottom of the barrel , the dregs of the oil refining process. But then along came the tar sands and better technologies for refining heavy oil into gasoline, and the price has climbed. John has noted that it has got so expensive that rural roads are going back to the stone age . But Chris W… Read the full story on TreeHugger
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Bike Trail Being Paved With Asphalt Made From Plants Instead of Oil
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on October 7, 2010. Filed under
Lifestyle.
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