Rosemarie Andolino, commissioner of aviation in Chicago, recently announced at the 2011 Airports Going Green conference that solar energy collectors will be installed on up to 60 acres at O'Hare International Airport, according to the Chicago Tribune.

Andolino also announced a service station selling alternative fuels for private and commercial vehicles will open on a 2.25-acre parcel of land just outside the airport, the Tribune reported.

"The solar panels will provide a substantial renewable energy source to help power O'Hare, and the alternative fueling station will promote the use of clean fuels and electricity to power vehicles," said Andolino at the conference.

The fueling station will provide bio-diesel, ethanol, electric charging as well as traditional fuel, Andolino explained.

O'Hare isn't the only airport in the nation utilizing renewable energy sources. Renewable Energy World reported Denver International Airport recently completed a 4.4-megawatt ground-mounted solar power system, which increases the amount of electricity the the airport is receiving from solar power to more than eight megawatts.