What's surprising is that the Mike Frerichs team got this right (or...would they say 'write'!) in other spots, but for some reason they failed to hyphenate the phrase "Small-scale" in "Small-scale wind farming".
Let's hope they update it.
For those keeping track:
Mistakes on this infographic from the Mike Frerichs for Illinois Treasurer team:
Error #1: They had a random period that they needed to remove.
Error #2: They used the word 'effect' instead of 'affect'.
Error #3: In successive sentences, they used "the state's" and "the State's". They still don't know which one is proper.
Error #4: This one! They forgot the hyphen.