Bolt comes with a trick-looking two-into-one exhaust system, which includes an oxygen sensor and exhaust gas catalyst that works with the closed-loop fuel injection system.
It would be more expensive to build more than one system of electric wires or natural gas pipelines to deliver power and fuel to every home in a state.
The brothers power their farm and cheese factory using an anaerobic digestion system, which turns organic waste into fuel, and cuts down on greenhouse gas emissions.