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Aerials of Darlington Nuclear Plants. It will cost Ontarians $46 billion to whip the province's troubled electricity system into shape to keep lights, air conditioners and factories running for the next 20 years. The plan unveiled by Energy Minister Dwight Duncan today includes refurbishing existing nuclear plants, building new reactors on those sites and doubling the amount of renewable power. (Photo by David Cooper/Toronto Star via Getty Images)

Aerials of Darlington Nuclear Plants. It will cost Ontarians $46 billion to whip the province's troubled electricity system into shape to keep lights, air conditioners and factories running for the next 20 years. The plan unveiled by Energy Minister Dwight Duncan today includes refurbishing existing nuclear plants, building new reactors on those sites and doubling the amount of renewable power. (Photo by David Cooper/Toronto Star via Getty Images)