Wisconsin is lagging behind other Midwestern states when it comes to clean energy.

That's according to a new study from the Wisconsin Energy Institute at the University of Wisconsin-Madison.

Wisconsin has no coal reserves or natural gas fields, and its power rates are second-highest in the Midwest.

Gary Radloff is the institute's director of Midwest policy analysis. He tells the Milwaukee Journal Sentinel that one answer is doing more with the resources Wisconsin has: cow manure, food waste and companies developing on-site power systems.

The state already has many digesters that convert waste to power, but Radloff says more would be built if the state allowed the companies that install renewable systems to pay the upfront costs.

But critics say that would increase costs for other ratepayers.