Where does your electric power come from and how is it generated? Q27 of The Big Here Quiz

The source of electricity is the "grid". But there are two power generators nearby that one would think supplies the local demands:

Brighton Beach Power Station is a natural gas-fired combined cycle electricity generating facility with a nameplate capacity of 580 MW located in Windsor... The facility is fuelled by natural gas supplied by Union Gas Distribution infrastructure. The plant delivers both 115 kV and 230 kV to the Ontario grid at the J. Clark Keith substation which feeds into the Ontario electricity market administered by the Independent System Operator.

and

The Lambton coal-fuelled generating station (GS) is located on the St. Clair River, in St. Clair Township, 26 km south of Sarnia, Ontario. Its four generating units are capable of producing 1,976 megawatts (MW) of power. The station's annual production is in the range of 11 billion kilowatt-hours.

According to the Ontario Clean Air Alliance (of which the City of Windsor is a member [!]), the Lambton Generator Plant is Ontario's #2 polluter (pdf).