Massachusetts and eight other states will announce significant cuts Thursday in allowable carbon dioxide emissions from power plants, according to state officials. The Regional Greenhouse Gas Initiative is expected to cut the current cap of 165 million tons nearly in half, to 91 million tons, said the Natural Resources Defense Council, a national advocacy group. The lower cap is designed to drive investment in clean technology and to compensate for lower-than-expected emissions because of the region’s increased reliance on natural gas, which produces smaller amounts of greenhouse gases.
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