Cheaper way to cut emissions may mean less focus on coal plants

As lawmakers consider a cap-and-trade system to reduce greenhouse-gas emissions from major emitters such as coal-fired power plants, there are those who say sequestering carbon dioxide at chemical plants, refineries and cement factories might be cheaper because these facilities emit purer gases than coal-fueled plants. "If we have a cap-and-trade scheme, it will happen wherever it is the most cost-effective," a former federal official said.

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