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Big Stone II coal-plant debate turns to carbon regulation

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The group of utilities backing the Big Stone II power plant, slated to be built near Milbank, S.D., filed new documents with Minnesota utility regulators Tuesday. The filing includes, for the first time, cost estimates for electricity prices that assume some type of carbon tax, cap-and-trade program or other regulation will add to the cost of generating power. An environmental lawyer representing the project's opponents said they're skeptical about a figure used by the utilities, though. The hypothetical cost of carbon regulation used in their report is $9 per ton of carbon dioxide emitted.