Even in Wisconsin, solar energy is booming. But the state lags behind other parts of the US.

Greg Nemet, a professor in the La Follette School of Public Affairs at the University of Wisconsin-Madison, knows this isn’t the first time people have declared the “dawn of the solar age.” People in the 1950s, the 1970s and the early 2000s all declared an imminent solar age, only to see fossil fuels continue to dominate.