Olympia Marble butterfly (photo courtesy of Michael R. Jeffords)

Spicebush flowers (photo courtesy of Tom Rollins for Clifftop)

Spring Beauties at White Rock (photo courtesy of Tom Rollins for Clifftop)

Shooting Stars in Winnebago County (photo courtesy of Jamie Johannsen)

1.5 MW Vensys 77 Gearless Turbine (photo provided courtesy of the City of Geneseo)

Kohl Children's Museum

Cook County Courthouse

Photovoltaic panels on the Rice Conservation Center (photo courtesy of Chicago Botanic Garden)

Energy Efficiency Renewable Energy Natural Areas