Methane is a Dr. Jekyll and Mr. Hyde kind of gas: on one hand, it is the cleanest-burning fossil fuel. On the other, if it leaks, methane itself is a much more potent greenhouse gas than carbon dioxide. In this special Hash It Out episode, Brian and Fedor go from 18th century Italian methane guns to present day Google Street View cars that sniff out methane leaks. Listen to learn about the history of methane, its current uses, and what is being done to curb its environmental impact.