For solar projects, development is simplest on open terrain that is easily accessible and receives full sunlight.
For wind projects, development makes the most sense on plains and agricultural land (cropland/pasture), because they offer consistent, predictable wind directions and easy construction access.
In southwestern Minnesota, where the most wind development has taken place, developers have preferred the Buffalo Ridge — a wind-swept, 60 mile long plateau that rises 800 feet above the surrounding terrain.
[Insert map with the wind turbines in MN. Take a screenshot from the interactive website: https://energy.usgs.gov/uswtdb/viewer/#8.2/44.063/-95.897 ]
The circled wind turbines follow the Buffalo Ridge.