"Corn ethanol can help in the short term, but it has serious limitations, and none of this is going to work if we don't dramatically improve the efficiency of our cars and trucks"

This quote by David Friedman recommends that corn ethanol can be a practical solution in the short term, however it has its constraints. He is implying that in order to make a real distinction in the long term, we must focus on improving the effectiveness of our vehicles and trucks. This suggests that we should try to find methods to decrease the quantity of fuel they use, such as through using electrical cars or more efficient engines. By doing this, we can lower our dependence on corn ethanol and other fossil fuels, and make a real impact on the environment. Eventually, it is clear that if we wish to make an enduring distinction, we should focus on enhancing the effectiveness of our cars and trucks and trucks.