You can heat homes with gas, propane, oil or electricity. Or you can make use of the virtually endless supply of clean energy that lies right beneath your feet.

Chicago police officials said swatting caused the response. Swatting takes place when a fake threat is called in to emergency officials. CPD said calls came into multiple schools.

One of these spots is in the back of a jewelry store, another is in an office building's basement—these are the best secret restaurants in Chicago.