This article was originally posted on RealClearScience.
Propane is the fossil fuel of red-blooded Americans. What poolside or tailgating experience would be complete without firing up the gas grill and torching some meat? (I know, I know… there are charcoal devotees out there.) Even metropolitan mass transit systems are getting in on the excitement. Fleets of buses that run on “LPG” (liquefied petroleum gas) are burning a mixture of propane and butane.
Currently, propane is extracted from natural gas or crude oil. But, in the long run, this is neither a sustainable nor an environmentally friendly practice. Burning propane extracted from the earth is also not carbon-neutral, though it is better than combusting oil or coal. Thus, researchers are looking for ways to produce renewable “fossil fuels” through the use of alternative technologies, such as synthetic biology. Last year, for instance, scientists engineered E. coli to churn out a biofuel that resembled gasoline. Continue reading