In OTL the explosion of gasoline powered vehicles wouldn't have been possible without advances in the refining of petroleum. Before these advances, gasoline was considered an "expensive by product", and the majorty of cars where either electric, or combustion using a different fuel. Ethanol, (also known as drinking alchohol) is easy to mass produce, so easy in fact that humans have been mass producing it for thousands of years for the purpose of getting drunk, and can be used in internal combustion engines. Let's say gasoline remains an expensive by-product, so the majority of car manufacturers begin mass producing cars that run off of ethanol instead. How does this effect the evolution of human culture and technology?