Every summer, America's roadways become miserable hot strips that go on and on for miles, adding to the already hot and miserable condition of the weather. The black asphalt soaks up the sun, producing loads more heat. This of course, has given scientists a genius idea: replace it all with solar panels. Wait, what?
The idea revolves around glass. Glass that can support the weight of all the cars, but is totally transparent. Beneath this glass road is an endless extent of solar panels that turn the light of the sun shining upon them into electric power. Sometimes this is interrupted by a car driving over it, but there would be more sun than not.
Due to the sheer bulk of Americas roads, much of them in rural areas where cars don't drive over them for days at a time, replacing all roads with this new kind would produce enough power to keep the entire country running. Dirtier powers like Oil, Coal, and even Nuclear would be practically obsolete. (China would take note, I'm sure.)