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Conservative groups and critics of President Obama's climate rules want Wednesday night's GOP debate to center on the high cost of environmental regulation, and the economic damage that comes from moving too far, too fast on emissions reductions to combat global warming.

The conservative think tank American Energy Alliance sent out documents Tuesday night detailing how the 14 presidential contenders at the debate in Boulder, Colo., should address the high cost of climate rules as they answer questions about the economy, which is the focus of the CNBC-hosted forum.

"During the debate, CNBC plans to ask questions about key issues like taxes, job growth and the overall health of our national economy," the group said. "While all these issues warrant discussion, let us not forget about one of the largest threats facing our economic future: President Obama's so-called 'Clean Power Plan.'"

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