In the US lots of crop land is used to grow corn for ethanol. This ethanol is mixed with gasoline for car and truck fuels. But suppose we just used that same land for solar? What would be the difference in energy produced? Turns out solar would produce 30x more energy. The story may be even more extreme. Car and truck engine are maybe 5x less efficient than electric. So given that all of this ethanol goes to transportation, solar could be 150x more efficient.