Fuel from thin air?
An enzyme found in the roots of soybeans could be the key to cars that run on air. An enzyme that normally produces ammonia from nitrogen gas, can also convert carbon monoxide (CO), into propane. While studying the enzyme Vanadium nitrogenase, researchers realized that the enzyme has some unusual behavior. Scientists removed the nitrogen and oxygen the enzyme is used to and filled the remaining space with CO. Once the nitrogen and oxygen were removed, scientists realized that the enzyme began to to turn the CO into short chains of carbon two and three atoms long, more commonly referred to as propane. While this technique is not perfected, scientists are hoping that this technique could lead to cars partially powered on their own fumes. Even further into the future, vehicles could even draw fuel from the air itself.