India built so many ethanol plants that it now makes more ethanol fuel than its cars can drink. Flex-fuel vehicles are the answer, and they are arriving faster than anyone expected. Here is something surprising: India spent a decade racing to make more ethanol, the alcohol-based fuel squeezed out of sugarcane and grain. It succeeded so well that the country now has a problem most nations would envy: more ethanol than the existing fleet of cars and bikes can actually burn. Tha